Hello, i'm trying to help a friend with a small project that requires swapping audio inside a .nes file with the audio from either a .FTM or .NSF audio source. I've read that this can be acheived by swapping the data through a hex editor, but would only work if you knew the audio start and end hex addresses and it may not sound right if the audio engine is different. If anyone is interested in helping out for fun or possible profit, please send me a private message.

Thank you.