Has anyone replaced the stock heatsink fan of a Pentium 4 2.4? I was looking at it and it doesn't look like it can be done. I want to upgrade the fan, but keep the heatsink if at all possible. So has anyone done this, or know of someone who has done this? Also, how hard would it be to just change the whole thing, heatsink and all. It is the stock heatsink so it has that sticky pad on the CPU. Is it hard to get that sticky pad off of the CPU? I don't want to damage the CPU by trying to get that stuff off of it. Is there and good articles on doing this? Thanks.