diff --git a/Aaru.Archives/Symbian/Structs.cs b/Aaru.Archives/Symbian/Structs.cs
index 273ad710b..5f3084877 100644
--- a/Aaru.Archives/Symbian/Structs.cs
+++ b/Aaru.Archives/Symbian/Structs.cs
@@ -33,12 +33,361 @@
 using System.Diagnostics.CodeAnalysis;
 using System.Runtime.InteropServices;
 
+#pragma warning disable CS0169 // Field is never used
+
+#pragma warning disable CS0649 // Field is never assigned to, and will always have its default value
+
 namespace Aaru.Archives;
 
 [SuppressMessage("ReSharper", "UnusedType.Global")]
 [SuppressMessage("ReSharper", "UnusedType.Local")]
+[SuppressMessage("ReSharper", "InconsistentNaming")]
+[SuppressMessage("ReSharper", "InheritdocConsiderUsage")]
 public partial class Symbian
 {
+#region Nested type: AttributeConditionalExpression
+
+    /// <summary>
+    ///     Contains an attribute to be used as a parameter in a conditional expression
+    /// </summary>
+    class AttributeConditionalExpression : ConditionalExpression
+    {
+        public Attribute attribute;
+        public uint      unused;
+    }
+
+#endregion
+
+#region Nested type: BaseFileRecord
+
+    /// <summary>
+    ///     Common fields to simple file record and multiple file record
+    /// </summary>
+    [StructLayout(LayoutKind.Sequential, Pack = 1)]
+    struct BaseFileRecord
+    {
+        /// <summary>
+        ///     File record type, in this case <see cref="FileRecordType.SimpleFile" /> or
+        ///     <see cref="FileRecordType.MultipleLanguageFiles" />
+        /// </summary>
+        public FileRecordType recordType;
+        /// <summary>
+        ///     File type <see cref="FileType" />
+        /// </summary>
+        public FileType type;
+        /// <summary>
+        ///     File details <see cref="FileDetails" />
+        /// </summary>
+        public FileDetails details;
+        /// <summary>
+        ///     Length in bytes of the source name (filename on the machine that built the SIS)
+        /// </summary>
+        public uint sourceNameLen;
+        /// <summary>
+        ///     Pointer to the source name
+        /// </summary>
+        public uint sourceNamePtr;
+        /// <summary>
+        ///     Length in bytes of the destination name (filename+path it will be installed to. '!:' for drive means allow the user
+        ///     to pick destination drive)
+        /// </summary>
+        public uint destinationNameLen;
+        /// <summary>
+        ///     Pointer to the destination name
+        /// </summary>
+        public uint destinationNamePtr;
+    }
+
+#endregion
+
+#region Nested type: CapabilitiesRecord
+
+    /// <summary>
+    ///     TODO: Unclear, check on real files
+    /// </summary>
+    struct CapabilitiesRecord
+    {
+        public uint[] keys;
+        public uint[] values;
+    }
+
+#endregion
+
+#region Nested type: CertificatesRecord
+
+    /// <summary>
+    ///     Holds signature certifications, but the exact distribution of them is unclear
+    /// </summary>
+    struct CertificatesRecord
+    {
+        public ushort year;
+        public ushort month;
+        public ushort day;
+        public ushort hour;
+        public ushort minute;
+        public ushort second;
+        public uint   numberOfCertificates;
+    }
+
+#endregion
+
+#region Nested type: ComponentRecord
+
+    /// <summary>
+    ///     Component record as pointed by the header
+    /// </summary>
+    struct ComponentRecord
+    {
+        /// <summary>
+        ///     Lengths of the component names, array sorted as language records
+        /// </summary>
+        public uint[] namesLengths;
+        /// <summary>
+        ///     Pointers to the component names, array sorted as language records
+        /// </summary>
+        public uint[] namesPointers;
+    }
+
+#endregion
+
+#region Nested type: ConditionalEndRecord
+
+    /// <summary>
+    ///     Contains an 'else' or 'endif' expression
+    /// </summary>
+    struct ConditionalEndRecord
+    {
+        /// <summary>
+        ///     File record type in this case <see cref="FileRecordType.Else" /> or <see cref="FileRecordType.EndIf" />
+        /// </summary>
+        public FileRecordType recordType;
+    }
+
+#endregion
+
+#region Nested type: ConditionalExpression
+
+    /// <summary>
+    ///     Conditional expression base
+    /// </summary>
+    class ConditionalExpression
+    {
+        /// <summary>
+        ///     Conditional type <see cref="ConditionalType" />
+        /// </summary>
+        public ConditionalType type;
+    }
+
+#endregion
+
+#region Nested type: ConditionalRecord
+
+    /// <summary>
+    ///     Contains an 'if' or 'else if' condition
+    /// </summary>
+    struct ConditionalRecord
+    {
+        /// <summary>
+        ///     File record type in this case <see cref="FileRecordType.If" /> or <see cref="FileRecordType.ElseIf" />
+        /// </summary>
+        public FileRecordType recordType;
+        /// <summary>
+        ///     Length in bytes of the record and all contained expressions
+        /// </summary>
+        public uint length;
+        /// <summary>
+        ///     Conditional expression(s) (chain)
+        /// </summary>
+        public ConditionalExpression expression;
+    }
+
+#endregion
+
+#region Nested type: MultipleFileRecord
+
+    /// <summary>
+    ///     Multiple language file record, cannot be marshalled
+    /// </summary>
+    struct MultipleFileRecord
+    {
+        /// <summary>
+        ///     Common fields to simple file record and multiple file record
+        /// </summary>
+        BaseFileRecord record;
+        /// <summary>
+        ///     Lengths in bytes of the (compressed or uncompressed) files, array sorted as language records
+        /// </summary>
+        public uint[] lengths;
+        /// <summary>
+        ///     Pointers to the (compressed or uncompressed) files data, array sorted as language records
+        /// </summary>
+        public uint[] pointers;
+        /// <summary>
+        ///     EPOC Release >= 6, uncompressed files lengths, array sorted as language records
+        /// </summary>
+        public uint[] originalLengths;
+        /// <summary>
+        ///     EPOC Release >= 6, length in bytes of MIME type string
+        /// </summary>
+        public uint mimeLen;
+        /// <summary>
+        ///     EPOC Release >= 6, pointer to MIME type string
+        /// </summary>
+        public uint mimePtr;
+    }
+
+#endregion
+
+#region Nested type: NumberConditionalExpression
+
+    /// <summary>
+    ///     Contains a number to be used as a parameter in a conditional expression
+    /// </summary>
+    class NumberConditionalExpression : ConditionalExpression
+    {
+        public uint number;
+        public uint unused;
+    }
+
+#endregion
+
+#region Nested type: OptionRecord
+
+    struct OptionRecord
+    {
+        /// <summary>
+        ///     Pointer to the option name lengths, array sorted as language records
+        /// </summary>
+        public uint[] lengths;
+        /// <summary>
+        ///     Pointer to the option names, array sorted as language records
+        /// </summary>
+        public uint[] strings;
+    }
+
+#endregion
+
+#region Nested type: OptionsLineRecord
+
+    struct OptionsLineRecord
+    {
+        /// <summary>
+        ///     File record type in this case <see cref="FileRecordType.Options" />
+        /// </summary>
+        public FileRecordType recordType;
+        /// <summary>
+        ///     How many options follow
+        /// </summary>
+        public uint numberOfOptions;
+        /// <summary>
+        ///     Option records
+        /// </summary>
+        public OptionRecord[] options;
+        /// <summary>
+        ///     128-bit bitmap of selected options
+        /// </summary>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 2)]
+        public ulong[] selectedOptions;
+    }
+
+#endregion
+
+#region Nested type: RequisiteRecord
+
+    struct RequisiteRecord
+    {
+        /// <summary>
+        ///     UID of the required component
+        /// </summary>
+        public uint uid;
+        /// <summary>
+        ///     Major version of the required component
+        /// </summary>
+        public ushort majorVersion;
+        /// <summary>
+        ///     Minor version of the required component
+        /// </summary>
+        public ushort minorVersion;
+        /// <summary>
+        ///     Variant of the required component, usually set to <c>0</c> and not checked by installer
+        /// </summary>
+        public uint variant;
+        /// <summary>
+        ///     Lengths of the requisite names, array sorted as language records
+        /// </summary>
+        public uint[] namesLengths;
+        /// <summary>
+        ///     Pointers to the requisite names, array sorted as language records
+        /// </summary>
+        public uint[] namesPointers;
+    }
+
+#endregion
+
+#region Nested type: SimpleFileRecord
+
+    /// <summary>
+    ///     Simple file record, can be marshalled
+    /// </summary>
+    [StructLayout(LayoutKind.Sequential, Pack = 1)]
+    struct SimpleFileRecord
+    {
+        /// <summary>
+        ///     Common fields to simple file record and multiple file record
+        /// </summary>
+        BaseFileRecord record;
+        /// <summary>
+        ///     Length in bytes of the (compressed or uncompressed) file
+        /// </summary>
+        public uint length;
+        /// <summary>
+        ///     Pointer to the (compressed or uncompressed) file data
+        /// </summary>
+        public uint pointer;
+        /// <summary>
+        ///     EPOC Release >= 6, uncompressed file length
+        /// </summary>
+        public uint originalLength;
+        /// <summary>
+        ///     EPOC Release >= 6, length in bytes of MIME type string
+        /// </summary>
+        public uint mimeLen;
+        /// <summary>
+        ///     EPOC Release >= 6, pointer to MIME type string
+        /// </summary>
+        public uint mimePtr;
+    }
+
+#endregion
+
+#region Nested type: StringConditionalExpression
+
+    /// <summary>
+    ///     Points to a string used as a parameter in a conditional expression
+    /// </summary>
+    class StringConditionalExpression : ConditionalExpression
+    {
+        public uint length;
+        public uint pointer;
+    }
+
+#endregion
+
+#region Nested type: SubConditionalExpression
+
+    /// <summary>
+    ///     Conditional expression that contains a single sub-expression
+    /// </summary>
+    class SubConditionalExpression : ConditionalExpression
+    {
+        /// <summary>
+        ///     Sub-expression
+        /// </summary>
+        public ConditionalExpression subExpression;
+    }
+
+#endregion
+
 #region Nested type: SymbianHeader
 
     [StructLayout(LayoutKind.Sequential, Pack = 1)]
@@ -163,5 +512,24 @@ public partial class Symbian
         public ulong reserved2;
     }
 
+#endregion
+
+#region Nested type: TwoSubsConditionalExpression
+
+    /// <summary>
+    ///     Conditional expression that contains two sub-expressions
+    /// </summary>
+    class TwoSubsConditionalExpression : ConditionalExpression
+    {
+        /// <summary>
+        ///     Left hand side sub-expression
+        /// </summary>
+        public ConditionalExpression leftOperand;
+        /// <summary>
+        ///     Right hand side sub-expression
+        /// </summary>
+        public ConditionalExpression rightOperand;
+    }
+
 #endregion
 }
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