One of the key components to overclocking the heck out of your CPU is, of course, a kick ass heatsink and fan combo.  Hands down, one of the best HSF's out there for the P4 is ThermalTake's Volcano 7+.
So, of course, I had to buy one.  Hell, I've already got two TT products in this box, what's one more.  And gosh darn it, it's got a silver grill...matching case components is always fun.
 

So, things to note:  Adjustable speed fan with High/Medium/Low settings for 6000/4800/3000 RPMs, depending on mood and desired noise level.  36 tiny copper fins to better dissipate heat and mounting clips for a P4 socket 478 or an Athlon socket 462 or P3 socket 370.  Handy...but I'm only interested in the P4 clips...why run a crappy Athlon, after all?
 

Next up we have to free the P4-1.8a from its existing setup.  The stock HSF had a thermal pad on it, so that will need to be scrapped off before the classic Arctic Silver 3 will need to be applied.  And boy, is it sure fun to make a mess with the Arctic Silver and almost drown your CPU because you pushed a little too hard on the syringe.

Pretty simply process of applying the Arctic Silver...they even have directions on their webpage for proper application.  Now it's just a matter of slapping the P4 back in it's socket, tossing together the Volcano 7+ (*some assembly required) and clipping the whole deal together...and taking some pictures along the way.

Very simple clip on process, easy removal too....sure as hell beats the removal process of the stock heatsink...just be sure to hold the HSF in place while your clipping it on as it has a tendency to slide around a bit.  All in all, it's a nice looking product...however, did we mention the noise concept?  It's no delta, but then again, it's about twice as loud as the stock fan...and that's just when it's set to medium...it's a bit like having a window fan on in your PC. 
Cooling results?  Well...I'm not impressed yet.  I was running at 2.4ghz with the stock HSF....now it will only run stably at 1.8ghz...rather disappointing, but needs further research.  Temperature wise, my idle temps are still 104°, just like before...heavy load temps (ie: Morrowind) run at about 125°, down from about 130°...but is the loss of 5° worth the loss of 600mhz?  But then, every review seems to love this little HSF...perhaps poor lil' dor has done something wrong?  Too much Arctic Silver perhaps?  Easy enough to clean off...we'll have to try that again soon....