Why not make your own list using ROMlister? That way you have a good list of your ROMS and don't have to go through a list to compare to what you have.
Edit: I attached the program with the needed additional files zip'd within so you can make the merged master list for more betterer organizing. For a great how to check out Jeff's page for
Romlister or the
Wiki. I did not ask Jeff before posting this but as there is no user agreement with this freeware and he is credited I think this falls within the open license.