[nmglug] Partition resizing

[a_kaluta]

Goodmorning Gnus;
Brief update,linux laptop stolen some months ago.
Loaded Ubuntu 5.04(what I had lying around) dual boot with Xp on desktop 
where have 15 gigabites unallocated space that I would like to dedicate to 
windows C drive.
tried qtparted from Knoppix. 5.1.1 without success, I could reduce size but 
not increase perhaps due to faulty knowledge.
Perhaps this is the time to try "Wine"
Tried fished around around the internet for a solution . Anyone suggest am 
internet tutorial type site addressing the Question?
Good To Be Saying Hello Again. Anthony