Yeah I have 3 roms on my computer and I have them games in my attic collecting dust.
Im pretty sure owning a rom which you already purchased is not illegal, I remember I bought a game not so long back for the pc, and in the small preint it stated you was allowed to create 1 backup copy for your own security reasons, anyway distributing a rom to people who dont own the original game is illegal thou.. I was a bit skeptical at first but somebody told me theyre pretty sure the cops wasnt gonna bust down my door because I was playing super mario all stars on my pc lol.
I guess the idea of a rom to swf conversion is probably an impossible task, I was over at flashkit reading up and they seem to think its too much work too.
Its sad, Im a fan of flash and im sure a flash version of a rom would be much better than the type of rom I have which.. messes up my video settings, buttons are configured horribly and overall stutters. Ahhh I might just get my super nintendo out
the rom would be almost impossible however making the emulator to read it wouldnt