I used to be an AMD fan and was good with the athlon64 x2 but I'm all Intel now but I think I can still help somewhat ....start out with everything on auto ......then start here
1. set clock ratio to manual ....and increase in small amounts like 5mhz at a time should be able to start at 220mhz safely.
2. bump your ddr2 voltage up to 2.1v or whatever the manufacture recommends.
3. F10 and save settings then boot into windows and check temps and run a stress test to see if it will be stable.
4. repeat bumping up cpu until it crashes.....then bump up vcore voltage till it becomes stable again but keep an eye on your temps and dont go past manufactures vcore ratings at least not on air cooling!
wish I could tell you more but with out seeing all bios options I can only give you that much....and I'm out of the AMD loop.