Door sags

Recently the driver side door to my 1996 Cougar began to sag, and is not shutting properly. Is there anything I can do to fix this problem myself without taking it to the shop. http://www.automotiveforums.com/vbulletin/#Banghead

Parts are $34 shipped. Check out the write-up and part info here:
http://forums.tccoa.com/showthread.php?s=&postid=306611#post306611