Here's what I do to get the offsets of the teams.
1. In C2004, go to team management, Base copy and see the note down the first 3 players of the team that u want to edit.
2. Open roster.pak in the hex editor and do an ASCII search for the 3 players seperately.
3. Get their hex ids. Ex: Player 1: A2 C2 .... Player 2: CD E7 ... Player 3: E5 FD
4. Then do a hex search in roster.pak for the 3 hex ids in the same order as in the team i.e. Search for A2 C2 CD E7 E5 FD
5. U will get a search result. The offset where the result starts is the offset of that team.
Hope this makes sense and helps.
Kewldude