although nintendo has this
http://www.nintendo.com/corp/legal.jsp#download_rom
and they really hate having people take their games I would say download at your own risk I now of a couple good emulators but I will not say which ones I know publicly on this forum.
what about final fantasy series? FF 7 and FF 8 are on the PC and they require something like a 10 year old comp with a 16 mb video card. I 've spent too many hours playing those ones
FF7 , 8
Faces of War (its like a RTS game but you can direct control units) I doubt you could run it though it may be right on the edge of your system requirements
there are older games of the same (!c is the company)
Soldiers; Heroes of WW2
I think metal gear solid is for the PC
same with metal gear solid 2