international nut of pastry - I think this lines mostly filler.

Parallels includes a tool to increase the size of a disk image... But it doesn't tell you how to make your install of Windows XP see that increased HD size.

This article explains how to do expand the size of drive within Windows XP itself.

http://deseloper.org/read/2006/12/expanding-a-parallels-disk-imagewhat-they-dont-tell-you/