I have tried to create a custom team myself. I want to share this information in the hope that we can put our heads together and figure out how to add custom teams.
You can create teams using present graphics, such as 95-96 Bulls or 03-04 Spurs. I tried two methods to create a new custom team.
1) I have tried adding .BIG files to the .VIV files in the FE folder. I used the 70 All Stars as a base. I renamed the files and hex edited some .EBO files. I also used the jersey raptor to add a new uniform. The "new" logos and graphics show in the various selection screens but the game crashes to desktop after loading 80%. Using non-custom teams still works.
2) I copied the .BIG files to the SGSM folder similar to adding player portraits. The game crashed to desk top after loading 80%. The error is "An exception 'Unhandled Win32 Exception' has occured in nba2005.exe."
themelloman5423,
You can add new teams just as you did for Live 2004. It requires adding players and teams to the various DBF files. Go here for a good tutorial :
http://members.lycos.co.uk/nbaliveturkey/