Thermostat Change

We think the thermostat on my mom's 97 Villager is sticking, because it's old. My dad and I were looking at the housing, and it looks like a bitch to get to. Could anyone tell me how to swap out a thermostat and what I need to remove to get to everything?

Read this
http://mysite.verizon.net/cshaines/villagerquest.htm

If you still need this, here it is.

http://autorepair.about.com/library/a/1g/bl721g.htm