1. Start > run > cmd
2. cd "C:\Program Files\Common Files\Microspoft Shared\web server extensions\12"
3. stsadm -o backup -url http://sharepoint2007:115/ -filename c:\backupssp115.dat
4. If successful this message will appear: Operation completed successfully.
Restore
1. goto Central Administration > Application Management > Create or Extend Web Application > Create A New Web Application > .....
2. After webapp being created goto Start > run > cmd
3.cd "C:\....12..hives"
4. stsadm -o restore -url http://sharepoint2007:115 -filename c:\backupsp115.dat -overwrite
5. If successful this message will come out: Operation completed successfully.