P4's are generally unlockable. tools i've found so far can only mess around with AMD multipliers.

there was this other tool that drops the multiplier according to your CPU load, but it didn't function with my 3.0E.

but playing around with the FSB should be sufficient enough for intel overclocking. i had a Neo2-V too (bought it when i killed my p4p800se) and managed to take the proc up to 3.6 (first person to spawn on BF2 ).