Well, partitioning the 250GB drive into 2 smaller partitions worked pefectly, thanks Metorical! [smile]

To celebrate, I went and got another couple of 250GB drives for my PC. I'm now 50GB shy of having 1TB of disk space [grin] I thought that was rather silly though, so I'm going to change my server over to 2x 250GB drives, and install visual studio (so I can do coding / testing at work), and re-organise my www folder so it's on it's own drive.
Wheeeeee!