Resizing linux root partition - Norton Ghost or Acronis Disk Director?

The situation: Today I want to increase the size of the main partition, or root partition ( or precisely the "/" partition, not the "/home" partition). And I tried to use norton ghost (since I am very familiar working on this software under Microsoft Windows). The original size is 7.8GB, and I wish to resize the to 30GB (by resizing current NTFS partition)

So I ghost the original partition (the 7.8GB partition) into a .GHO image and place it on a fat32 partition. And then I resize the 7.8GB partition to 30GB, and then I ghost back the image to the brand old new 30GB partition.

The Problem: No problems with "Ghosting", my kanotix box boot and loads perfectly into the KDE desktop....except for my box still recognize the brand new partition is 7.8GB in capacity - although the /proc/partitions is showing the current volume size...but the box just fails to detect the new configuration. eg On the properties menu, it shows Free disk space : 1.2 GB out of 7.8GB is used (85% used).

The Solution: Forget about the Norton Ghost, simply resize using Acronis Partition Expert (no need to install, just run it on live cd) or Acronis Disk Director (works in my Windows XP). My boyish knowledge of playing around with "GUI based boxes of partition" allows me to simply resize the partition. And my kanotix box detects the changes without any problem.