@WillB I have asked for this in the past too (via feature request). I used this function back in the 0.29-0.30 era and it worked great because our system names are based on a OU prefix plus the dell asset tag.

There are other ways to get this to work, some manual some using postinstall scripts. It would be better to have that function back in FOG (IMO). But as Tom says, imaging comes first.