mmrideagirl,
Thank you! We used a Fry reglet "Contemporary Reveal"--
http://fryreglet.com/details/reveals/jpg/Page%20G2%20Contemporary%20Reveal%20WEB.jpg -- to form the track, and used some screen door roller hardware (found at the hardware store) to make rollers attached to the back of the panel. Truthfully, it is kind of clunky and binds, and could stand improvement. Our panel is quite lightweight -- a piece of Marrimeko fabric stretched on a frame -- and anything heavier would only be more problemmatic. Of course, we wanted something recessed -- if you could stand something surface - mounted to the face of the wall (easier for an existing wall, of course) I think it would be easier to design something more functional. Good luck -- please share the results!