Reducing Partition size in Vista

[Furton]

I'm trying to reduce my C: partition size in Vista however it won't let me shrink the drive further as it's demanding to have just over 110GB of free space. Surely it doesn't need that much space, is there anyway around this?

 

[OspreyO]

I had no problems. Its in here somewhere.
http://apcmag.com/5485/dualbooting_vista_and_xp