With Filestar you get 0 different skills for working productively with LithTech REZ Archive (.rez) files.
About .Rez
Name
LithTech REZ Archive
Extension
.rez
Format
Binary
Category
Game
Developer
Monolith Productions
Description
A Monolith Productions REZ archive - the LithTech engine's data file used by Shogo, Blood 2, No One Lives Forever 1/2, Alien vs Predator 2, Tron 2.0 and Contract J.A.C.K. Filestar extracts its files.