The only way I know of to use the Win-7 BackUp & Restore applet to back up different drives to different targets, would be to manually change the settings each time.
There are several different backup programs folks like. For your purpose, might consider Acronis True Image, where you can set it on individual schedules, a source to target image backup, or image then incrimental backup. You can even backup just My Documents, or Outlook, from a specific source to a specific target on completely different schedules.
You can go into a TIB backup file type and extract individual files if you want.
You would have to use the specific application to restore a propriatory backup file or image, for assurred functionality. Most can be restored from within windows, or with the purchased or downloaded and created ISO CD if Windows died.