Adding Trees to a Portal Map

[wafflestomper]

Simple question:

How do you add the great looking trees in HL2 to a Portal map?
I have found info on the prop_detail and also referances to prop_foilage, but I cannot seem to find any solid tutorials or guides that explain how to get trees into a Portal map. Any good advice would be appreciated.

WS.

 

[Stene]

prop_static, then browse to model directory props_foliage and look in there.