replace 3d models in 2k9?

is it possible somehow? i'm patching the pistons court at the moment and i just want to copy the celtics-backboard from 2k9, since almost every team is using them now in real life. i want to replace the pistons backboard, but it's not possible in textmod:

http://img244.imageshack.us/img244/3453/3dmodnf8.jpg

any other program to edit 3d-models?