Yes you would place them in the bin folder to be next to the maya.exe.
It worked for me to fix up my sluggish UV selection in the UV Texture Editor (went from 10+ seconds down to instant or maybe 1-ish second if I select a lot).
I'm running Maya 2011 x64 in Win7 Ult x64. I think the version of ATI drivers I pulled the dll files from was 10.8 (I'm double checking right now) and the .dll files themselves say they were modified on 8/4/2010.
-Edit- Okay I just tested downloading 10.8
(winvista/7 x64) and extracting from there, then replacing the current set of dlls in my bin folder with these new ones (date modified 8/3/2010 for some reason) and the performance is just peachy. Opened up a scene with 4 2048 textures and about 75,000 triangles and selecting every UV in the scene only had a delay of about 1.5 seconds in the UV Texture Editor.
Admittedly it is very much a trial and error method as you might have to try several driver versions before you find one that works.