First of all, I'd like to thank everybody tracking this mod for their interest. It means a lot to me!
Second, I finally managed to kill of the bugs crawling around Companion Cube.
It's not technically cube anymore, looks more like some barrel, but idea remains: you can push it around, lift it with Grip function of the gun (key [f]) (BTW: did you hear about NASA's tractor beam? :) And of course, you can toss it through portals.
Before release, I want to make button (trigger), that you can put cube at, to toggle it. But that shouldn't take too long now... Expect release tomorrow!