LABN is the root container for all files in Grim Fandango bundles.

"LABN"	dword	Block identifier
dwFormatVersion	dword	File format version (usually 00 00 01 00)
nFiles	dword	Number of files (LE)
dwUnknown	dword	Unknown
dwUnknown	dword	Unknown
loop nFiles
dwUnknown	dword	Unknown
dwOffset	dword	Byte offset to file relative to start of bundle (LE).
dwSize	dword	Size of file in bytes (LE).
dwUnknown	dword	Unknown
end of loop
loop nFiles
szFileName	string	Filename
end of loop
followed by files