NBA Live 08 Editor help

[sgn15]

I am new to using to modding and I ahve this Slam Dunk x Kuroko No Basket Mod where there is a team Shoyo-Ryonan (Sho-nan) where their jersey preview pic is Sacramento but when you play them, their players use their separate jerseys (shoyo jerseys for shoyo players, ryonan jerseys for ryonan players).

I would like to create a new team with jerseys that function exactly like that, how to do it? After I created a team, I can't even add (I mean copy) players to the blank new team's roster I made.

Help please.