Have an idea for your rom collections: Goodtools. These are a series of tools for various systems (GoodSNES, GoodGen, GoodN64, etc). They can recognize, rename and categorize your roms for you. Most collectors use these tools as a "standard". Makes it easier in trading/leeching roms because it generates a list of what you're missing. Many roms on the internet are bad dumps. Tons are hacked too. These tools will help you pinpoint which roms in your collection are "good". Give 'em a try!