Reducing the size of a volume group

Sun Jan 16 21:19:41 UTC 2011

I have a system with 1 hard drive which I am dual booting with Windows NT and Fedora 14.  I would like to shrink the Fedora 14 LVM partition to make more room for the Windows NT partition.  I have reduced the root logical volume to free up 20G in the volume group and would like to shrink the volume group by that amount.  Thanks in advance for your help.

Chuck 		 	   		  