mcbiff,
Use the FOP32-1, it was redesigned just for Socket A, you should not have to grind anything off if you have the correct GW model.
The retention clip and the heat-sink on the FOP38 is identical to the FOP32-1, I just removed the side cover of my F-K 320 case to double check mine, I have the FOP32-1 mounted on my Athlon cpu and the FOP38 is sitting here on desk.
The only difference between the two is the fan, plus the 38 comes with a chrome fan grill!
The 32-1 is a tight fit, especially the first time you install it.
I did not have that much trouble w/mine, but I was building a new pc and the mb was the only thing mounted in the case and the case was laying on its side.
I used a very good set of needle nose pliers to grab and press down the clip (not the ones w/smooth jaws!)
I think most of the damage to mb's was from either rocking the hsf during installation or tool slippage and the resultant damage to surrounding area.
AMD spec's call for 15lbs pressure hsf/cpu contact. Do not remove pads from cpu, the only contact necessary is the small square cpu itself.
These hsf's are high quality and designed for Socket A use, they are not the same cpu smashers as the Gorbs, I am not saying they are the best cpu coolers made, but they are possibly the "best-value" hsf for Socket A use.
Just my long-winded $.02 worth.......................