Rotating dif files

Ok, when you insert a prefabricated dif model, how the heck do you rotate it in game?

When I select the object and press F3, there 4 numbers in the Rotate field, default
being 1 0 0 0. If I change any of these numbers and press apply, the editor simply resets the rotation value back to 1 0 0 0.

So how am I supposed to rotate objects? Is there no way to rotate the objects freehand?

Sorry if this is the wrong forum to ost in, but there isn't a mapping forum.

Thanks in advance for any help.

-TorQue[MoD]