Low effort: Someone asked for this so here it is. I don't know if anyone else has a use, but maybe it can be useful to you. Codebreaker 3MB total size Powered by neoIP Binary from the no dummy CDI.
I assume you put this as disc 0 for GDEMU, select the change disc option, then press the button to change to the game disc?
Doesn't work with automatic detection within gdmenu for gdemu. after testing and reading more about how gdmenu loads and identifies the codebreaker disc, i realize that it should be a gdi with a scrambled binary that then unscrambles the binary. (very odd situation) the person who is using this on usb-gdrom said it worked fantastic for them