It seems that AE v0.6.9.419 doesn't support .pack files
so I can't use that to extract or repack the archive :/
It did manage to repack it but when i replace the original data0.pack
with my modified one then the game refuses to start.
The Filesize is also bigger than it should be so I assume AE didn't manage to get it right
Edit: @IceD I was a bit slow, don't worry I posted it now