I'm having a little difficulty deciding how to mirror oddly-sized ROMs for the SNES when burning onto 32Mb PROMs. Say I have a ROM thats 20Mb in size (2.5MB). Is it best to mirror the last 4Mb onto the back, making it 24Mb, then copy the last 8Mb of the new file onto the back to make 32Mb (in other words, copying the last 4Mb of the original file onto the end 3 times!)? or is it best to copy the last 12Mb of the original file onto the end to make 4Mb? My feeling is that I should do the first option, but I'm not sure. I know that it doesn't matter too much for most games, but some ROMs can detect mirroring and use it as a form of copy protection. Thanks for any help.