I have a question.. help please

i was wondering if its possible to place different skins on the same model type... for example, i wanted to have the Terra Magus skin on one blood mage, and the Fire Elf skin on another... is this possible, so far i have been able to get to work.. :? help please

The only wat to do it is to make a copy of the unit's model so they have different models.

Is there an easy way to copy models?