i searched the internet to no avail... so one brain fart later this was born!
we got the stuff to decorate it from the prom catalog. the music teacher is happy because she can use the frame for her plays and such. you can use the whole 40' long frame or only a couple of sections. the fittings are permanately attached to the vertical pipe pieces with screws. it all breaks down easily and stores in a closet in the basement.
the main section is 8' high and 40' long, each section is 8' x 8'. the cross pieces that hold it up are 2' on either side (4' total). the photo op for the parents is a seperate 10' x 10' section with the same cross piece dementions. the whole thing cost us under $200, for the frame. the decos were a bit more, but we can reuse the star backdrop plastic for a couple of years. the 2007 columns we'll have to replace of course. we spent maybe $500. i probably could have gotten the pipe cheaper at one of the big home stores, but we've got a lumber yard catty corner to the school and it was easier to pick up the pipe this way. the 5 way and 4 way special fittings i got at http://www.hartnagels.com/pvc.htm . it's made with 1 1/2" pipe.