I dug up some old working out for using Uscript.

These instructions show how to compile scripts found else where and changing the properties of objects in the game.  The example I will show is extending the properties of the Flack Cannon to increase its ammo count.

To explore other items you may wish to change get a copy of the Script source and look through it for scripts that you wish to control.

How to Override Default Properties of a class

FlackCannon Example:

Folder structure:

Inside of C:\Users\UserName\Documents\My Games\Unreal Tournament 3\UTGame\Src\

Start by adding a folder where your work will be held. In my example "TestPackages" will be the starting point. Beneath that add Classes folder.  Then place the text file with the code you wish to change.

So

C:\Users\UserName\Documents\My Games\Unreal Tournament 3\UTGame\Src\TestPackage\Classes\MyFlackCannon.uc

With the text editor of your choice eg Notepad++ create MyFlackCannon.uc in the Classes folder.  Be sure to save in ANSI format.

In this case I am changing the ammo count variables.

To do this find UTWeap_FlackCannon and create your own custom class using the syntax:

class "name of .uc file you made" extends "name of class your changing";

{

adding the variable you wish to change beneath this, enclosing in curly braces

}

 So

__________________________________________________
class MyFlackCannon extends UTWeap_FlakCannon;

defaultproperties
{
   AmmoCount=30
    Locker AmmoCount=40
    Max AmmoCount=60
    ItemName="My Flak Cannon"
    PickupMessage="You got a better Flak Cannon"
}

__________________________________________________

Before compile time go to

C:\Users\UserName\Documents\My Games\Unreal Tournament 3\UTGame\Config

and edit: UTEditor.ini

beneath
[ModPackages]
ModPackageinPath=\UtGame\Src

\\Add this line. 

ModPackages=TestPackage

"TestPackage"  This is the name of the top level folder you placed your script in.  This tells the compiler where to look when compiling.

Save and close this file.

To compile place the make flag on a short cut to UT3.exe

ie  "C:\Program Files (x86)\Unreal Tournament 3\Binaries\UT3.exe" make

Now run the short cut.

If all goes well a console will pop up with the out put of the compilation telling if it completed successfully.  If so continue, else carefully go back and check your file names, their paths and syntax are all correct and repeat.

The Custom Weapon Class will be available inside of Generic Browser Pickup Factory Tree

Go ahead and place the actor inside of game.

When publishing this level place the the resultant script (MyFlakCannon.u) into the /Published/CookedPC/Script Folder.  That new script should now be available in game.

Because of the inheritance properties of Uscipt it is easy to create new custom classes that extend (inherit) all the properties of another class. So allowing small and large changes with next to no understanding of the language, so giving the novice a toe hold with which to explore the language.