Well, I was bored, so I made a map and just randomly added in a bunch of units out of stats.txt which no longer exist, or shouldn't be used this way:
Shaman - are really fast moving officers (like DG speed) - don't really do anything at all except die. If they're set as runastask, the game will crash when they die.
Tank - runastask prevents you from actually placing them, it seems. Seting this as 0 just places the unit, which you can control but doesn't show up as a task. Seems to move and fire with rmb click, so could be a casualty of the apparent control scheme changes that have occured between Darwinia and Multiwinia
SpaceShip - creates a giant futurewinian UFO. The beam it uses to beam units up will recolour to the team it's on, but it wil always beam down futurewinans; http://tgf.the-icebox.com/crapmods/arealinvasion.JPG
DropShip - look just like tiny futurewinian UFOs, don't appear at all as tasks, and do nothing as placed units.
Tentacle - I have no idea what these really are. They seem to be wierd verticle centipedes, killing everything at their base. DGs didn't attack them (I guessed they might be centipede based when they crashed with an in unit flag error, so Iset them as count 20 inunit 1). These are actually pretty cool http://tgf.the-icebox.com/crapmods/ohmygodwhat.JPG