I think I can help you out, but I'll need more information than what you've given (i.e. memory brand and model, temperatures at idle and load, voltages to your CPU, memory, and chipset). Please post a screenshot of the SPD tab from CPU-Z as this will give me a better starting point.
As far as a best guess? Try setting your vCore to 1.7 and manually specify FSB 200. That should work okay, but keep a close eye on your temperatures, both of the processor and northbridge chipset.
In order to run your ram at 200 mhz you need to loosen the timings to 3-3-3-8 in the bios. Increase your fsb in small increments (1 or 2 mhz) at a time. If it becomes unstable up the voltage. I am not sure what the max acceptable voltage for your cpu is. I would look that up. To test stability after each round use prime95 or sp2004. You can download memtest3.2 online to test your memory for errors. You should lock your pci/agp at 33/66 in the bios.
If possible, you might have to lower you CPU multiplier.
You might have to run only 2 banks of your RAM and not all three.
You might have to bump your RAM voltage up as well.
Make small changes, not large ones. Trial and error. Just by reading your CPU-Z screenshots tells us that you're going to have to loosen your RAM timings to 3-3-3-8 but who knows you might be able to get it stable at 2.5-4-3-7.
Read through the guide as it covers the basics as well as what programs you can use to test your system for stability.
I'm not trying to be rude, I'm just trying to help you learn how to do this yourself.