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well there also is an other method to use to rotate entire buildings that's new to the CoD 2 tools... by KilLjoY

it's a new type of entitie called misc_pfrefab

here's how it works

-make a house in a seperate .map file just leave it unrotated you might add all the portals , models, lights and triggers to it to make it more easier later on

-open up the map where you want the house right click in the 2D view and select misc --> prefab this will give you a popup window in there select the .map file that you just made containing the house press ok and there it is your house is in the map

and now you can rotate it anyway you want without deforming it

if you want to make some changes to the house just openup the .map file of the house change it and save it it will also change in the other map