Import and play/3 in 1

hi
-1st, I would like play with my modifier units. In the world editor, they are modifier and when I play they are normal :p Why ???
-2sd,when i export 1 model with 3 texture, how I import them???
thx

sorry for my english

Read some other threads, especially the sticky ones.

1. Import them into the map.
2. That would need different models with different paths for skins in order for it to work.