Opacity texturing of models?

I have some ships models and textures I am trying to convert and mod into Sins. Some of these happen to have antennas that were applied as a double-sided flat plane, then were sort of "cut out" by using an opacity channel to hide the part of the plane that was not antenna. Is there a way to deal with this for Sins, or should I choose between removing the antennas or not using those particular models?