I’ve read some articles of how to backup/restore Sharepoint application. Of course you can use stsadm -o backup&restore to do the job but you can also backup/restore content database from sql server directly. Even this is not recommended by some Sharepoint guru but I believeit is good to know and it might work in your scenario (for example, move production/staging/QA envirnment to your dev envirnment). Ok, here are the steps.

http://spsite.wordpress.com/2008/07/10/backuprestore-sharepoint-content-database/