friendly_type works. You can use this on units and structures to change what the user hears when focusing on the unit with the cursor or hitting f4 for information. A good example of when to use it is if you have several units that are all of the same type but have different skill sets, such as if you had, say, a mage, and then in the next map you had the same mage but he now knew a new spell, you could use friendly_type to make the mages look the same, because you would otherwise have to make their fileames sound the same, and that's just a lot of trouble considering the variety of synthesizers and screen readers people use. So basically, friendly type is nice insurance for that. It is also useful just to make a unit name shorter, or as a way to disguise what units really are without confusing you as the map creator.
