MRV, you can play the game with AA enabled. I am doing just that in Windows 7 64 bit using Geforce 7600.
Suggest you download the latest nHancer, which is an nvidia card graphics tweaker, (you will need the latest geforce drivers to use it). On the Profile tab for that .exe you can set the profile to AA and AF settings. Have a play with it and see what works for you. Mine has AAx16s and AF16x
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