Since the partition is already mounted you cannot re size it directly booting Redhat Try this
Download the img file of parted to windows partition (assuming that it is Fat ) boot from Redhat CD and goto rescue mode From there mount the windows partition from there mount the partd img as loopback
use command
mount -o partboot.img /some/path/to/mount CD to /some/path/to/mount and run it from there
Regards
I tried to make a 'Parted' bootdisk, but could'nt manage to. Could anyone help me with this? I'd really like to try out and play with other distros too, and besides, I could use the extra distro to see if various progs and stuff work and i'm using them right(like trying to install a new window manager without messing up the primary system). Thanks, Ravi