Some answers:
1: Hit Export Stage file on the Multi-Player controls box and then upload the file at
www.thecfl.us (top right)
2. No way to save (really aggravating), so you must do everything at once. You can save gameplans though.
3. Extract the zip files to your the leagues folder which can be found at the following location: C:\Users\[YOURUSERNAME]\AppData\Roaming\Solecismic Software\Front Office Football 2007\leagues
4. No restrictions. That said it is a very bad idea to move a team in MP. Don't do it - you'll be economically hamstrung for years.