Load
up Vegas, and create two video tracks, load your console clip in to the
upper track, and the action clip into the lower track. You should have
something which looks like this.

Now we want to set up some track filters for the console layer, so that the grey becomes transparent. Click on the Track FX icon for the console track, and add the following two filters. PluginPac
PixelStretch, and Saturation Adjust. You can see the settings we use
for these FX below. They ensure that the grey background is copied all
the way down the screen when we move the console to the correct
position on the screen, and that the colours are vivid. You may wish to
save these FX settings to a Filter Package for later use.
 |  |
Pixel Stretch | Saturation |
Next we need to position the console text on the right place on the screen. Open up the Event Pan/Crop
settings for the console clip, and use the following settings, again,
you may want to save these settings to a preset, so you can use them
later.

Finally,
we need to set up the overlay method for the console layer, otherwise
we just have a screen of grey, which doesn't tend to make a very good
frag movie. :-) You should then see that the video preview shows a
transparent console overlayed on your action clip. Good job! You'll
notice that you can see black text in the console also, for all those
annoying clans that insist on using black tags ;-)
