Well, maybe you should try a different method. Since the game is for GameCube, you could rip the models with Ninja Ripper and import into 3DS Max. If your lucky the models will come out in T-pose.
Ninja Ripper
Alternatively, you may be able to open the PS2 .DFF files with RenderWare if you where to somehow obtain a copy of the game.
Ninja Ripper
Alternatively, you may be able to open the PS2 .DFF files with RenderWare if you where to somehow obtain a copy of the game.