..it's so hard to explain?..when you have created a new archive of textures( arenas or wrestler models) you save it in PAC..then you must inject this PAC (with same name of bpe) into the place where stands original bpe.
exemple. in bpe is named
09.bpe ,your textures archive (pac)must be named 09.pac
at this point do injection:
09.pac->09.bpe
note: if you don't change space in the codes, your textures pac archive (09.pac) must be
as 09.bpe (same size) or be sure game will crash.
creating a pac archive is sure that will be bigger than bpe ,so you before to do it ,when you create your textures in png indexed color and convert in GIM ,be carefull to work on smaller images..until youwill have a bytes archive same as bpe original file.
if you wanna create an archive more big than original bpe you have to modify other codes because you ask to the game more places for your file