Modding up Mum's PC

Thermalright Extreme 120
Originally uploaded by TheScream.

As a (now very late) Mother's day present, I'm upgraing mum from a AthlonX2 4600+ 2GB system to a Core2Duo E6400 2GB system with a freaking huge Thermalright Ultra 120 Extreme heatsink. As you can see by the photo... I misjudged the height of the bloody thing so now I've got to mod the case just to fit it.