yeah, that's the inverse of how most people do it.
They grab a torrent to get a full set of roms, then (and this is where I think romlister shines) you create a list of games that will work on your machine (ie, monitor orientation, # of buttons, controls) and then simply spend an afternoon or seven going through that list and finding games that you never knew about and turn out to be a lot of fun. But, it's your journey!