I realise this question has been asked a million times before, but I am still struggling so I thought I'd ask.
I have a P4 1.7GHz in an Abit TH7-II Raid mobo. I have tried altering the multiplier without success. My FSB is 400.
In simple steps, could someone take me through what I can alter (without resulting to physical hardware mods) to get the most from my setup and how please?

P4 1.7GHz, 512Meg RDRAM, GeForce MX400 32MB video, ABIT TH7-II RAID (not using as RAID).

Thanks in advance...