As the regulars know, when the game is over, there is some sort of bonus effect, like snow, or pacman, or the matrix, etc. I call this the "Game End Splash".
Anyways, if you don't want this game end splash to appear, I have provided the ability for you to set a key to toggle it off and on. Why? Because sometimes it is nice to take screenshots of the final score without the effects in the way.
First you need this.
http://www.birdieman.com/downloads/medScoreBoardTogglePackage.rarUnzip it somewhere, then dump all those files into your UnrealTournament/System folder.
Then start UT.
Open Options/Preferences, go to the Controls tab, and scroll down (see pic).

Choose the key you want to use (obviously).
You are done. Try it at end game on the server. You can press it as many times as you like, it toggles it off and on. You can even press it before the game is over if you already know you are going to take a screenshot.
Let me know if you need any help.