What tschak909 suggested will likely suit your needs best, other then that:
The ATI card can probably be made to work by installing and configuring the latest ATI drivers manually up to UI2+masking (so no transparancy, which is considered to be overrated by many people anyway).
I don't recall anyone ever sucessfully reporting the use of a second display with LMCE, but in theory that should be possible too, however I doubt you'll want to spend that much time and effort on it.