I have done it a few times. There is a great write up here http://virtualweberbullet.com/chipotles.html . My first time was with just a few brickets and smoked them at 100 or so degrees. The second time I bought a cheap hotplate and set the smoker up like shown at that link, keep the temps down as low as you can.
I smoked mine for a couple of hours or so then put them in a dehydrator overnight.