This isn't really the proper place to ask this question, if I were you I would create a thread in the main creation and customization forum. More people are likely to see it. And it wouldn't be 'thread jacking' warmasters thread.
So, GIDustin could probably help you figure it out, he has a site you can find
here and is always helpful, but he is busy. It won't be easy to convert the units, not as simple as Jimmyh's tool would make it anyway. But as far as I know, you need to download a utility to alter the graphics. I don't know about SWGB, but for AoK you can download,
Mod Pack Studio. It might be a missing link that you need. There are lots of people that could help, so you should post a topic in the Main C&C forum here at Civfanatics.
And again, thanks for the unit Warmaster, I gave him the ability to move twice and have the blitz ability. His Attack and Defense stats really can't be universal, it would depend on how tough the average modder made the Sith Knight unit
.