The very good videos that 3D Buzz created are now sadly out of date in places. The crowd system in particular has changed and as per usual, the documentation in UDK is lacking and in places incorrect. Don’t get me wrong, it is hard to be able to knock something that is free, but with the constant changes it becomes very hard to find tutorials that are actually current. So I was rather happy last night to find a crowd tutorial that was created in May 2011 beta. So thank you to theguildhallatsmu on youtube.