I know has been a whiiileee since this topic was alive, but i need tips here please.
I do read all post on this thread and now i am translating Batman Arkham Asylum to spanish subtitles whit the help of the unpack tool; however, i have found a very important issue and is the modification whitout making smaller/big the file whit the HEX editor.
I mean, on some english sentences of the game i can't put it on spanish on less character cause same sentence on spanish is larger; everybody knows that game is going to crash if i modify the size of the file.
So, my question is if at this point (3 years since game came out) exist a tool that can pull out the audio files on the english .upx to combine it whit the spanish subtitle? (The subtitles are attached on the sound file) BIK tools can done this stuff whit BIK videos.
If this magic tool exist, i could make it work on a Windows batch file to make the translation process easier

hahaha. Anyway, thanks to Gildor for develop the extract and decompress tools for the .upx files.