Yea I would stick to the Hair/Fur modifier for grass, thatched roof and of course hair and fur. You could also try painting instanced geometry with scripts like Niel Blevins (SoulBurn) object painter script for a lower poly approach. And your signature is really distracting. Big wall of white text... gah is this 4Chan?
from: http://www.antiflash.net/supergrass/download.html within the official help file it says: (in the download zip) did you read that? so to me it reads like this: copy the "grass.dlo" into your 3dsmaxFolder/plugins i.e C:\Program Files\Autodesk\3ds Max 9\plugins ... and follow the rest of the instructions edit: btw. hair…