Explained:
Open Botpack.int in Notepad, scroll to the bottom and at the very end add the following line:
[code:1:cf8d1a176e]Preferences=&#40;Caption=&quot;Game Types&quot;,Parent=&quot;Advanced Options&quot;&#41;[/code:1:cf8d1a176e]
Note that in his post, he made a typo....&quot;GameTypes&quot; should be &quot;Game Types&quot; (with the space)
then you can open &quot;Advanced Options&quot; in the view menu in UnrealEd, or Start ut, open up the console and type [b:cf8d1a176e][i:cf8d1a176e]preferences[/i:cf8d1a176e][/b:cf8d1a176e]
You will see the newly created &quot;Game Types&quot; menu with gametypes found by scanning the UT directory (I'm pretty sure anyway cuz it loads the custom mutator INI info as well)

On that note, he included a zip file in the first post with int files in it that add even more options to the advanced options menu like mutator configs n stuff