Bernie:
Dan Cullman and Scott Thomas are the cover gurus, but for what it's worth:
1) Install all wood. Paint the wood where the fabric touches with Poly Brush.
2) Cover the bottom first. Shrink and stitch.
3) Install the interior walls and headliner. Insulate as needed.
4) Install the metal baggage compartment if you have one. (Very important to do this AFTER installing the headliner- it makes the headliner installation so much easier).
5) From Dan Cullman: "Here's my take on covering the 14-13/14-19 fuselage. After all your work on this portion, wiring, wood, priming,blah , blah. You cover the belly in one piece....Now, using two full width pieces, you drape this assembly over the top and sides of the fuselage. Use "T" pins,and pencil marks, mark the backbone of the airplane. Double sew this line. Turn it inside out. Trim excess fabric. Pull the seam line just off center, glue and shrink."
6) One word of caution- do NOT brush back over your Poly Brush when freshly laid down. It will cause streaks and runs that will show through when you paint. If you miss a spot, wait until dry THEN go back and get it being careful not to get your brush into some previously painted Poly Brush.