you know, if you use DreamSNES you can use a seperate disc for ROMs...thats what i do.
i dont see why you need to have a multisession disc....when you get ROMs just make a collection on a new CD. i dont know how much your CDs cost but i went to fry's a couple weeks ago and got 50 cds for 8.50 USD

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everyone says generic CDs are crap....but not for me...