Help - Replacing Driver Side Mirror - motorized

Looking for some high level directions on how to replace the Driver Side mirror on my 2000 Grand caravan. Been knocked off by careless drivers too many times and costs an arm and a leg to have replaced by shop. Found after market mirror for $39.00. Any help would greatly be appreciated !

This might get you on your way : http://www.autozone.com/az/cds/en_us/0900823d/80/1a/50/27/0900823d801a5027/repairInfoPages.htm

Perfect ! - Thanks for the Help !