Thanks Ted it was the actual figure I couldn't work out when it was in MBs and didn't have the conversion figure but I went to the link in Dwarfs post and I've just come back after reading that and saw your answer.
Thanks again I should be good to go now but it will probably be Saturday when I get the chance to play about with all this.
Another thing after looking at a video for installing Windows 7 onto the new partition just checking if I have this right.
When I've shrunk the C: drive I just boot from the Windows 7 DVD and tell it to install to the unallocated space I've just made, I don't have to format or do anything else to the new space or do I ?
I'm not thick when it comes to computers and I've dual booted a machine before with XP and WinME but it was a few years ago and I can't remember it really and I was using Partition Magic when I did that