these are physical CPU FSB, you need to multiply those by 2x to get the effective frequency. "xCPU host freq. 166mhz" means its running at 333Mhz effective.
"133ddr266--166ddr333--200ddr400(what do these mean) ddr ram?? my ram is ddr400 pc 3200 256mb" means this should be set to 200ddr400 for your memory.
"can change to 250 max and when done pci/agp changes to 50/100. doesnt seem to save these changes " means you are screwing up your FSB. 250 means you are asking the CPU to run at 500Mhz, not possible for a xp2700.
if you do not understand these basic things why are you screwing with your advanced chipset features? you are asking for trouble.