Yeah, PB off would work, but at that point you might as well hack away with everything because nothing is stopping anyone else from doing it.
I can think of 2 solutions for this. Figure out how to enable AA in BC2 (which uses deferred rendering I think, so this is unlikely). I heard STALKER, also deferred rendering, got a forceware patch to force it in the control panel, but I dunno.
AA breaks PBSS somehow.
Other solution is finding out why the lod bias doesn't work in DX10. Maybe hit up the Riva Tuner or nHancer forums for such a solution.