
Sorry im late.
Here's how sketch up works kidz.
You make a model, Either export it to .3ds or .obj.
Then, bring it into a "post processing" editor. Like milkshape, or blender.
Add joints and such.
But! First you need the model out of sketch up?
So how the forget do you do that Pandan?
Either you buy sketch up like i did.
Or you cheat..
Well, Cheating then cheap ass.
1. Save as .kmz file. (google earth)
2. Rename .kmz to .zip.
3. Extract the file.
4. Start your favorite program that can import Collada 1.4 files. (FBX converter)
5. Import the .dae file found in the models folder you just unzipped.
6. Do whatever else you need to do and export normally.
FBX converter
http://usa.autodesk.com/adsk/servlet/item?siteID=123112&id=7851697