Will,
If you can be more specific as to what you are wanting to do it migh help. I for one feel that most floor repairs can be done without taking the shell off of the frame unless there is really significant frame damage that can not be repaired without taking the frame entirely out. Check out the following threads for a lot of information on what I did and things that others did too.
http://www.airforums.com/forum...0&page=1&pp=20 An alternative to plywood
http://www.airforums.com/forum...ad.php?t=13732 Some discussion about shell on techniques.
"
Shell Off vs Shell On" several notes especially my post #74
"
HELP!!! On a tight schedule, need to replace..." my post #26
Hope this all helps,
Malcolm