Here is a root structure displaying where each file should go.
.. UT2004 folder
--- System
DeployableFun.u
DeployableFun.int
DeployableFun.ini
Deploable Fun readme.txt
Run UT2004, and from the Mutators list select Deployable Fun and select a map to play on.
2. Deployable Fun.. what does it do?
Deployable Fun allows you to configure the max amount of grenades and spider mines you can have deployed at one time. For example, you could previously have 8 grenades out at a time, but you can now configure this value up to 100. Just choose Configure Mutators in the mutator section and pick your values!