I saw on this site:
http://www.heatsink-guide.com/maxtemp.htmin the
Cooling FAQ section (click the link on the navigation bar to the left)
that to clear dust, you can just vacuum clean the dust right out of
the CPU. here is the exact text on the site:
"The first step is to check the CPU fan, the air intakes of your case,
and all case fans for accumulated dust. With PCs that have been
running for many months, and thus have become dusty on the inside,
removing dust alone can bring down temperatures drastically. Use a
vacuum cleaner (while the PC is turned off, of course). When you
approach the vacuum cleaner to CPU or case fans, it will cause them to
spin - no problem, they won't be damaged if that happens."
If this is true, it would make doing this a lot easier for me. Infact,
is this was true, I could do the job right now!