you have the fsb set correct (133mhz) and ram set at 166mhz.
not sure about the other settings as dont have your make of mobo.
overclocking is up to you. nobody can tell what the max overclock you can do, as it all depends on system and other factors. i have a 2000xp overclocked to 2200xp using easytune4 on gigabyte ga-7vax with pc2700 512mb ddr ram and good all copper heatsink and fan.
bewarned though, if anything goes wrong when overclocking you only have yourself to blame.