Issue: While the terminator commander I painted up is pretty cool-looking, he is also hella overpowered, especially for the smaller-sized games that are actually possible to finish in a couple hours' time. (This is actually one of the reasons I haven't been pimping the game much after my initial push - having one model roll over the entire Tyranid force is Not So Fun.)
Solution: Use one of the other heroes.
Issue: The other heroes in the rules are a chaplain and a librarian, neither of which are easily available in plastic. (Looks like there exists a plastic chaplain, but only available as part of a box set, and nobody on eBay was selling singles that I could find.)
Solution: Hey, wait a minute. Wanting to be true to the RAW is all well and good, Dave, but you may be the only person on the planet collecting for it right now, and there aren't going to be any Advanced Space Crusade cops showing up at your door. So reskin! Use the Chaplain stats for, say, a Captain.
Thus:

He's not done yet, but that's the idea. Sort of makes me wish I'd gone with metallic gold rather than yellow for the whole force, it's so easy.

So hopefully I'll be in a mood to start shanghaing people into playing this game again soon, heh.