I've replaced the struts on my Windstar.
It's a decent DIY-able job for someone with reasonable mechanical experience.
I shared what I learned in this old thread:
http://www.automotiveforums.com/vbul...d.php?t=746337
Note that the link to the photos in the original post is now dead (Webshots stopped hosting personal photos), but I've edited the original post, and added it to the end of the thread.