Change face type of group of faces?

[rocketalces]

I have a couple of large building models that were inadvertently made with the "shiny texture" face type. Only noticed that in the beta test phase (weird shadow effects etc).

Is there a way to change the face type of whole group of faces or do I really need to select faces one by one, then "edit current", etc.

[Rep Fan]

Open up the model in Binedit
click Faces
Select All Faces
click Groups
Set Group Face Type
click 0X18 Normal Texture [MTM]
click OK
and save it.