Currently Being ModeratedDec 11, 2012 10:55 AM (in response to ashmatt04)
The easiest way is to clone your internal hdd with SuperDuper or Carbon Copy Cloner to the new external hdd via USB 2 connection. Then replace the old drive with the new cloned drive.
First use Disk utility to partition the new hard drive and select GUID as your Partition Type. It will not start up otherwise. Depending on the size of the disk contents it can take several hours to complete.
Currently Being ModeratedDec 11, 2012 7:25 PM (in response to dalstott)
Thanks for the response! Yes, it was very simple. It did take over 3 hours total with disk formatting (10 min), downloading SuperDuper! (Free! 5 min), running super duper-cloning the HD (2hr 50min for 157 gigs), booting from my external hard drive with cloned HD to verify it worked (5min), and finally replacing the old HD with the new bootable HD. My Mac is faster and everything appears exactly the same. I wish time capsule/time machine had a way as simple as cloning.