I'm in the same boat. Need to upgrade my macbook's internal HD from 80GB to something bigger.
Please confirm that I can do this:
1) use SuperDuper to copy my internal HD to a bigger HD via external USB enclosure, making sure to name the bigger HD the same as the internal HD
2) remove the internal HD
3) insert the bigger HD into the macbook
4) boot into the same OS with the same settings and files but more space
