How would you build a doodad?

Ok this is going to mess with your mind, as it has been with mine for a bit now. It seems entirely possible to build a doodad. I've been trying to get a peon build a tree that I can chop back down again, but have been failing miserably. Does anyone know how to do this or have a good idea where to start? I'm thinkning you would have to replace an unused building or something. But I'm all ears. We must unravel the mystery of constructing doodads.

One word: Triggers. I have been thinking about this since they removed the build gold mine/regrow trees specials. Cenarius actually uses the regrow trees ability during the campaign but hey he is a demigod. You'll want to set up something that triggers a patch of forest to grow or be rebuilt. Your not going to be able to get the trees built directly since the doodads are very configurable.

Are you talking about getting trees to ressurect after they are chopped down?

Actually I was trying to get a peon to build a unit that looks like a tree, chops like a tree, gives resources like a tree, sounds like a tree, smells like a tree and by golly IS a tree. hehe.

...

well...why would you want that?

You can't. If you found a way to get a unit to use the tree model (which you probably won't) then the peon still would never recognize it as a tree so it couldn't be chopped. You just can't do it that way. You have to use triggers to make or regrow trees. You could make a unit that looked like a tree (If you can make it look like a tree somehow) and immediately after being built gets replaced by a real tree but you need to use a trigger in there somewhere.

there are create destructable doodad commands in the triggers

try something like
event player - unit finishes a construction
condition event response - constructed structure is a 'custom tree'

remove event response - constructed structure
create destructable doodad tree at position of unit(constructed structure)