Personally I would set the jumpers to OFF. This will activate Softmenu, so you can change the FSB conveniently in the BIOS, rather than have to open up the case and fiddle around with annoying jumpers.
Set your FSB to 133MHz via either the jumpers or softmenu (preferred) and you'll be running the CPU at 800MHz (6X133).
The AGP divider controls how fast the AGP port runs. It has no bearing on how fast the CPU runs.