You can't it will show up both sides, on one side it will show correctly and on the other it will show it reveresed. Sorry for letting your hopes down put you can place it on the hood of the car or anything that doesn't show on 2 times on the warthog
Maby try putting the clan's name then bellow put the clans name horizantaly flipped. It might look weird but the clans name will show up on both sides.
Okay guy thanks a lot to those people that helped me and now I know how to put texture and model. But when I'm gonna keep modeling and skinning I'll probably have more questions.