1) Nomenclature
2) Putting and angle together
3) Using the B Source to put video in TVs.

(Fig1) Each folder in the Virtual Set Pack contains all the files for that particular set. You can navigate to a particular folder in Ultra using the browser tab. Once the folder is opened the first file should be StudioXX_UltK_NTSC_0001.png (Fig1). This is the base file for use in the Background tab. Each subsequent file 0002.png, 0003.png and so on are different angles of the same set. There's also a Mattes folder, this folder contains different mattes for each angle of the set. There are two kinds of matte files, FG for foreground objects like desks, and BG for background objects like TVs. These correspond by angle number, for example the desk for StudioXX_UltK_NTSC_0003.png is in the Mattes folder and is called StudioXX_UltK_NTSC_FG_0003.png. The matte for putting video into the TVs for this angle would be StudioXX_UltK_NTSC_BG_0003.png. Replace XX with whatever studio number you are using (in this case 31).

(Fig2) (Fig3) Start with a fresh project in Ultra. Drag your unkeyed footage into the Inout Clip and set the key. Navigate the browser tab to the folder of the virtual set you want to use. Drag the angle you want to use into the background input box. You should now have your talent keyed over your background (Fig2). Go to the input tab and size your talent to fit properly in the set. Next we'll put the foreground in. Go back to the Backgrounds tab and open the Mattes folder. Drag the FG (Foreground) file that corresponds to the angle you used for the background (ie, if you used StudioXX_UltK_NTSC_0004.png for the background you should use StudioXX_UltK_NTSC_FG_0004.png for the foreground). Drag this into the overlay input box (Fig3) and it should lay right over your keyed talent and background and your composite should be finished.

(Fig4) Start with a fresh project in Ultra. Click on the Virtual Sets tab and enter the Basic folder. Drag the Simple Keyed with B into the Virtual Set input box (Fig4). This will give you a single video plane to place where the TV in your background is. But first. Drag your unkeyed footage into the Input Clip and set the key. Navigate the browser tab to the folder of the virtual set you want to use. Go into the Mattes folder and drag the angle of the BG file you want to use into the background input box (ie StudioXX_UltK_NTSC_BG_0004.png. You should now have your talent keyed over your background (Fig2). Go to the input tab and size your talent to fit properly in the set. Next we'll put the foreground in. Go back to the Backgrounds tab and open the Mattes folder. Drag the FG (Foreground) file that corresponds to the angle you used for the background (ie, if you used StudioXX_UltK_NTSC_0004.png for the background you should use StudioXX_UltK_NTSC_FG_0004.png for the foreground). Drag this into the overlay input box (Fig3) and it should lay right over your keyed talent and background and your composite should be finished.