If you got the right patch it should have came with a bat file to automate the process. Read the instructions. It should tell you to move the files to the same folder as the psarc file and then run the bat file. If you want to do it by hand with the version of psarc I linked you too put psarc in the same folder as the file you want to extract, go to your command prompt, change directories to where the psarc file is and type "psarc.exe extract (name of psarc)" without the ()
Fiery the angels fell. Deep thunder rolled around their shoulders... burning with the fires of Orc.