0skills,  ut3cc is a very good tool
Its very easy to use, try it )

Download ut3cc to:

MyDocuments/MyGames/UT3/UtGame/Cache

- Save 
- press right click at ut3cc in cache folder
- then click extract here
- Run the ut3cc
- Open UT3 Cache Converter
- click configuration &gt; options
- click on change to select CustomMaps
- then click save (picture of two floopy disks on the right)
- select maps that you want and click button with arrows on th bottom-right
- done