I'm not quite sure what you mean? The rotation angle of the the showroom should be the same as all the others. If you want free camera the press f7 in the showroom.
Nice work, can't wait to use it. This helps BIG time in locating small errors in skins when skin modding. The light and shades of other showrooms tend to give sometimes a wrong impression of the skin. Thanks for making skinning a bit easier now :-)