Phantasy star online textures modifying

[WORM_BustR]

I extracted textures from *.afs files, modified them with the photoshop lugin and now... i need something to put the modified textures back into the afs archives.
If you know where I can find a program to do this please make a link or something!
thanks in advance!
[WORM] BustR

[Darkfalz]

http://darkfalz.kiczek.com