Well, I don't know how he did it, but for the permanent roof I made a wooden frame that fit over the top of the portion to be covered -- 2x4 attached to make a rectangle of the correct size, then I attached wire to that for predator proofing, and attached a few cross pieces to which I could attach corrugated roofing. To give it a slight slope, which is all I need for rain water runoff, I just put shims (small pieces of wood) on the side I wanted to have higher up (so it would drain away from the run). The permanently roofed portion has a wooden framed foundation, so I ran some boards from the foundation to the roof frame to tie it all together and keep the roof from blowing off in high winds, but you could also use tie downs that sink into the ground or wire the frame of the roof to the prefert panels too (though if you have very high winds, I'd probably tie down the panels in some way with spikes or the like, just to be safe). Sorry I don't have any pictures of the process -- didn't know then how incredibly helpful the pictures are on these forums!
