I KNEW I shouldn't have looked.  It's so funny cuz you are so technical yet you know how to do it cheaply.  And here I am, trying to make modular wood sets.  There's one lil thing I wish you discussed.  How you make those walls 'removable'.  It's something I've been trying to figure out myself.  As it stands, I figured I'd make a generic base, screw on those metal L-shape brackets and then screw in a vertical wall.  And yeah, I skip the ceilings too.  I've been finding, as any dio person probably has when doing sets, that camera angles are huge.  I'm worried that I won't be able to get the right angle with static walls.  
I'll have to remember to use foamcore in the future.  I'm just too lazy to go the art store.  Plus, I like to be able to move my sets w/o them sagging or buckling.  *shrug*  Probably explains why I'm using wood at this point.  I've got a set I'm working on now and if it turns out, it should be totally gnarly.
Thanks for all the info.  I also like the how-tos from people to give me ideas.
