I search for solutions in this order: Past Code, Unreal Source, Wiki, BUF, groups.yahoo, google, screaming at monitor. – RegularX
The UDK alone cannot create your own map or even your own game, it requires other cooperative programs to help you with models, programming, and other aspects that make a video game whole. This category contains a list of programs that can be used along side the Unreal Editor to help you for whatever you hope to achieve using Unreal.
This category has the following 3 subcategories, out of 3 total.