I tried to add foliage to my map. All I managed to do was to break it. Info below.

Basically I tried to add hellbushes (the treeline barrier from Yavin, Endor, etc.) to my map without adding foliage first. It didn't work; nothing showed up. Then I tried to add the stock Endor foliage--I just copied Endor's prp file and the respective msh/odf files needed. Munged, map loads and crashes just before 100%. Clean munged, map loads and crashes once I choose a side.

Any idea what might be causing this?

EDIT: Removing the MAP.prp "solves" the problem so it's definitely something to do with this file.

EDIT: Solved; quite a stupid mistake. Make sure you copy end_prop_treebill.odf, not end_prop_treebillboard.odf

Hm. You did everything correctly. Maybe you had too much foliage on your map. I know there was a limit of that.
Then you must make sure you have the odf and msh's from the asset map in your world 1 folder.
Ah and make sure your prp file is called XXX.prp. XXX=3 letter world name.

I used only one layer of foliage, and my map, while fairly big, isn't bigger than Endor.

I wonder if the problem is in the hellbushes. Is it a problem if it intersects with the foliage? Will try it again, from scratch (not the map, the foliage).