From: Birdsboro, PA, USA
I messed around with this also, and found that the best thing to do was remake a special armored unit from the ground up, all units numbered as infantry. The biggest problem is then that the AI won't pick any more infantry usually, since the core is, in the AI mind, all infantry. You could in theory, also make new infantry units an number them as armor, for DCG games, so the ai will pick them after your core, haven't doe this myself. I have a campaign going with Italy after 1943, and armor core.