I suggest you just raise your multi plier to 11 to achieve your desired 2.2GHz, it's much safer. Also if you have value ram the chances of it wanting to work stable will be lower than if you had high performance. You need to use a memory diagnostic tool such as memtest86 after you've overclocked your RAM if you choose to take that route, to insure stability. There's also another diagnostic program simply called 'Windows Memory Diagnostic' so I'm sure it's on the microsoft.com website. If you want to overclock your FSB to 220 instead of changing your multiplier to 11 then do this:
Change the FSB in increments of 5, once you hit 210 and your computer still boots up. Run the memory diagnostic. I wouldn't be surprised if you get some errors. Not to worry though, if you go in and loosen your RAM timings you will be able to better stabelize it. You will also possibly need to raise the Dimm voltage but be VERY careful with that, just raise it up by the smallest increment your computer can and test it with memory diagnostic. The timing you want to loosen is the Cycle Time (Tras) so look for that and bump that up one notch.
Silver has basically explained it pretty good, but I was just going to say regarding the PCI and AGP, if you adjust simply the multiplier you won't have to worry about locking the AGP and locking the AGP automatically locks the PCI bus because they have a 2:1 ratio. With your CPU being 200FSB normall the CPU:AGP:PCI ratio is 6:2:1 = 200:66:33, 66x3 = 199 but it gets rounded to 200 ya see? So if you raise your FSB by 20 and have 220 then you'll have 220 divided by 3 = 73.3 and your PCI would then be 36 so you'll be pushing the AGP and PCI pretty close to their limits IMO.
Conclusion: I think you'd be better of just raising the multi to 11. Raise it to 10.5 first, then 11 to make sure it can take it. If you insist on trying to raise the FSB without being able to lock the AGP and PCI bus then I'm telling you to be careful with that cause chances of frying something are easy. Good luck