Shoutbox

I *think* if you right click one of them and select "New Simple Volume" and then right click it again(once done) and say "Extend volume" you can extend it onto the other 2 unallocated ones

If you want to make them part of the WinXP or Win2k3 volumes, you can use the extend volume thing again.

If you just want to join them but keep them unallocated then I'm not sure.