Here are a couple more guides with photos for each step:

http://esmolak.squarespace.com/home/2010/7/26/how-to-make-a-chalkboard-fridge.html
http://redvelvetgirls.typepad.com/emma/2010/11/my-chalkboard-refrigerator.html

It involves sanding the front doors of the refrigerator using a hand-sander, to take off the glossy texture, painting a layer of primer on the doors and painting two layers of chalkboard paint and letting them dry after each layer. You also need to remove the handles before the process and put them back when you're done. Good luck with your project!

http://www.etsy.com/listing/103525033/distressed-framed-ivory-framed

You might want to consider one of these framed chalkboards. They are so nice! Just click on the link