BleepingComputer.com: Backup scheduler

I'm on Vista Ultimate trying to set it up to run a COMPLETE image backup every other day. Everything I read said that when I try and run it a command prompt should execute. I don't see that and I have followed the directions from the following two sites:

http://www.vistaclues.com/how-to-sch...ete-pc-backup/
http://www.myptsmail.com/blog/?p=412

Any ideas?

EDIT: I am able to run it manually from the backup and restore center. Also, how does the whole file shadowing thing work and how will Vista manage the backups? If my current backup is 47gb and I have it running every other day, after two days am I going to have used about 90-100gb or does it update it somehow?