ZT Package

Some values unknown, but still readable.

Unlike other CatSystem2 file formats, the .zt package format does not have a proper file header.

File Structure

do while FileEntryHeader.OffsetNext != 0

FileEntryHeader

Position = StartPosition + FileEntryHeader.OffsetNext
StartPosition = stream.Position

Data Type	Value	Description
uint32	OffsetNext	The offset to the FileEntryHeader
uint32	Unknown	Unknown 4-byte value, ztpack.exe throws a fit when it's changed
uint32	Length	Length of FileEntry after this header

FileEntry

This always immediately precedes the FileEntryHeader.

Data Type	Value	Description
uint32	Unknown	Unknown 4-byte value
char[256]	FileName	The file name of the entry
uint32	Reserved	Unknown 4-byte value, seems to always be zero.
uint32	CompressedSize	Compressed size of file
uint32	DecompressedSize	Decompressed size of file
byte[CompressedSize]	FileData	Zlib-compressed file data