Well, I never got to buy Skies of Arcadia so I might try searching for it (I know, I know, the good game I lost, etc, etc, xP I hope Ebay or whatever place that still has it won't rip me off...) I can't help you there but for the anti-aliasing, I enabled it in the Nvidia Control Panel (I have a GeForce 7300GT, the options I set were 4x for the antialiasing and 8x for the anisotropic filtering) and voilá, NulllDC recognized it and started showing everything in its anti-aliased glory.
I attached you two screens from Rez so you can notice the difference. First one without full-screen antialiasing on and the second with that enabled. Yes, at 1024x728... and still running at full 60fps. I hope NullDC will eventually acquire the "godly" state
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NO REFUGE, papá... NO REFUGE.