Save them as OBJ or use Poseray (free program) to convert. Then use the obj reader in TG2 to load the OBJ object.
The best way is to use Poseray in all case. Mostly it makes the best TG2 friendly OBJ files.
Do a search here on the forum. There are many topics .
Planetside i think it would be good to make this a sticky or some chapter for itself here on the forum.
Mostly there are the same questions .
Welcome Radom to the forum

Kadri