Re: Final Final List!!
If you're referring to the AMD heatsink, I would use the stock fan with the stock heatsink. I don't think you would notice much difference if you were to put that thermaltake fan on a stock AMD heatsink. You can use the thermaltake fan and they're own heatsink if you wish.
The question is, how big are the AMD fans? If they're the same size as the thermaltake fans, you could probably mount the fan where the exisitng AMD fan use to be. Don't make this hard on yourself. If you wish to use thermaltake, just use everything (heatsink and the fan). That's the whole point on getting an aftermarket cooler.
*Fact: Microsoft Window's Blue Screen of Death vs Computerforums.org's White Screen of Death. Which is worse?