These basic tutorials courtesy of Redhawk explain how to perform some common and basic tasks in UFPS.
This tutorial gives a detailed overview on how to get started with UFPS.
Redhawk has a great collection of UFPS tutorials ranging from basics to hardcore modding. A must see!
This series explains how to recreate the landmark FPS level “E1M1” from classic DOOM using ProBuilder and UFPS. Part 6 and 9 focus on doors, triggers and elevators in UFPS.