I'm with stupid ^^
Changing a CPU isn't a hard task. I think getting the heatsink on and off killed more CPU's the static discharges or overseeing the lever(where do you think Zero Insertion Force Socket came from).
If you bought a boxed cooler, there might be some paste in the Hs itself. This stuff aint that good, so u'd be doign a good job replacing it with silver-goo.
Don't forget, the best ammount of hs-paste is very little. I rmember my cpu went up to 70'C putting the entire dose of gel supplied with my cooler on my precious K6-2. For a barton core(dunno if there are any other 2800+ cores), even a drop @ the size of a pea is too much.
Ps: Why the need to buy a new cpu? A 2400+ is just fine and most of em are very well overcloackable. I'm running on a 1800+ and only during games i curse it's speed :P
AthlonXp1800+ @ 1800Mhz(air)<br>Sapphire Radeon 9600XT 256 mb @ 570/684 (air)
<br>Gigabyte GA-7VAX KT400(Bus @ 175Mhz & AGP @ 70Mhz<br>
512Mb PC2700 DDR-Ram @ 350Mhz