Resizing Linux Partition (parted or ext2resize)

I've copied my Linux "/" partition (using Norton Ghost) to a larger
partition on a new new drive. Well, "df" command still shows the old
size.

Found & installed parted and ext2resize utilities, but which is best?
I assume they should be run from like a CD boot since I'd otherwise
be overwriting the runnng system!

Appreciations,
Gene