exe mods

I was wondering how easy it would be to copy SRB2's main data, then alter the music, levels and characters and add more characters. Is it easy or is it more complex?

Altering the music is easy. Copy Music.dta, put it somewhere else, go into the copied Music.dta with some lump editor, take out some files, put other files in, copy the edited Music.dta back and you have custom music. Idk about the characters thing though. Just the music.

As for replacing the 3 main characters, set the CHARACTER Variable in OBJCTCFG to 1, 2, or 3. For adding more characters, it's quite simple to just set CHARARCTER to 4.

Levels and music can all be done in a single WAD without having to rip Music.dta. All you need to do is replace the levels, make a new MAINCFG, and then add the music.

In other words, the Wiki is your friend.

Well for characters I mean like replace the sprites of Sonic, Tails, and Knux.