The only way to overclock the Intel P4's is by raising the Front Side Bus, or FSB for short. The "Multiplyer" on the P4 2.4C is locked at 13, so to get to 3.2 Ghz you'll need an FSB of 246.
If your RAM is running in Sync w/ the FSB, you'll need RAM than can handle speeds of 492 MhzDDR (246 x 2)
If you're RAM can't handle those speeds, then you can choose to run the RAM at a lower speeds, in a ratio to the FSB, like 5/4, or 3/2, etc. etc...Say your FSB was at 246, and you RAM was running at a 5/4 ratio, the resulting RAM fequency would be 196.8Mhz , or 393 Mhz DDR
The timings on the RAM will have an effect on the RAM as well, generally the lower the number, the faster the RAM, but at tighter timings, the RAM will not be able to hit it's highest frequency..
The same RAM w/ loose timings may hit 450Mhz, but with tighter timings may only do 400Mhz....
Hopefully somone will post a link w/ some good info, there's quite a bit to learn there.
Basically, if you want to clock that Intel up to 3.2 and run the RAM in sync, you're going to need some VERY HIGH QUALITY RAM...you're going to be cutting it very close w/ that PC3200, you may want something that will hit DDR500Mhz.....