Questions about creating new teams

Hi guys
I have a few questions about creating new teams and players for NBA 07.
1. Is there a maximum limit of teams?
2. Can I also edit that all my teams play in a different championship, so I won't see them together with all the NBA teams?
3. Assuming the answer to no.2 is Yes, can I play a full season or maybe dinasty with my new created league?
4. If I create a bunch of new players for my new teams (not NBA related), and I want to start a normal NBA season, will it be affected in any way?

Thanks.

Here is a tutorial that might help you out. It's a little old but i do beleive most of it will apply.

http://www.nba-live.com/dbf/custom_team.php