Nice to see the English Professor is on duty tonight.
Like Sideburns said stick to manipulating your memory in your bios for now. Once you have a great handle on it then you might want to look at A64 Tweaker. I have used A64 frequently because sometimes with a certain multiplier some of your memory timings will not be available.
For example if I was had a 355 HTT x an 8 multiplier to give me a net frequency of 2840MHz and this gives me the memory divider options of 133MHz or 150MHz. I know 150MHz is too much for my memory and my computer will not post, and 133MHz is below what my memory can handle. So I will open A64 Tweaker and choose 133++ (which is 140MHz in actuallity) and it allows me to get that little bit more out of my memory. That is all I would use A64 for. Adjust your timings, HT frequency, etc in your bios. If you crash from windows it may cause some unexpected and unpleseant occurances, and if you do something that causes instability it will do just that, crash from windows. So once your know your bios backwards and forwards and know where you can push your memory, use A64 Tweaker as a useful tool.