Exporting *.u files for UT3
This is fairly simple. Normally you need to create launch options for the UT3.exe, but I’ve created a little batch file that will do this for you. Simple enter:
"PATH_TO_UT3\UT3.exe" batchexport %1 class .uc "C:\My Documents\My Games\Unreal Tournament 3\UTGame\Src\Exported Scripts\Classes"
… into a text file and save as ‘decompile.bat’ and keep it anywhere you like. Be sure to edit your path for UT3 in the first section of the command. So for instance “C:\Program Files\Games\UT3\UT3.exe” or