Ultra Different Cameras angles of a single virtual set,

Hello,
I'm a very new user of Adobe Ultra CS3.
I want to use it for a News Channel. So my basic need is a virtual set (Which is already included).
I can key out my talent, pan, zoom etc but my problem is that sometimes i want the talent to be displayed in a tight Camera, sometimes in midium & wide Camera and sometimes the output monitor (for news clips). My problem is as soon as i change the camera (virtual set) it changes for the whole movie. Is there any way to change the virtual set in the middle of the show other than outputting it in many video clips.
I tried keying out the talent and exporting it for premier it works but i dont have the virtual set (SInce i dont want a single VS in the whole clip). Is there anyway to use the sets with other NLE because ultra does not support editting lips like other NLE.
What do you guys use Ultra for? only keying, or make many short clips for many camera angles etc.