Cheers guys.
That you tube vid made it look real simple, Now i know exactly what items i need to do it & how to do so im gonna have a go on my i7 CPU.
Would i do my ultra-120 cooler in exactly the same way? that's a lot bigger and could be more awkward.
EDIT: just found this ...
http://www.youtube.com/watch?v=YPWSMxnoDwk