ST33N. Just keep putting bazookas on the flanks from the start and you should be able to whittle down the tanks, and with some riflemen in the center, you can draw some fire from them. You only have to defeat so many before it gives you a morale victory...
quick and skippy are the ONLY cheats I've found... If you check the link to the guy's website, he mentions the codes and says he blocked them, but they still work...
I'm kinda annoyed that I find a datapad or the blueprints in the storage room, and while I'm reading/looking at it/them, I hear that thing... Actually, more freaked out than annoyed...