Adding more space to Windows?

I installed Vista Ultimate on my 80 GB Macbook using BootCamp. I assigned 18 GB for Windows and the rest for Mac OSX. My Windows hardrive is almost full and I was wondering if its possible to add a couple more gigs to Windows? Or is it too late?

You can, but you'll need to reformat the boot camp partition and reinstall everything. You can add a partition for storage, but that's not always ideal.

I see. So how exactly do I add a storage partition and will it be accessable by both Windows and Mac?

Anyone? I really need to add more space to Windows so if I add another partition I want it to be accessable by windows.

So I take it from the silence that formatting is the only way . So I guess I'll do that. Just one thing though, if I format Windows using Disk Utility, the space will automatically add up to Macintosh HD right?