Use the bundler application included in the GRAW 2 1.03 patch (public_tools folder)

Copy the patch.bundle into the bundler folder, create a folder named data in there and used the following commandline in the comandprompt.

bundler extract -r patch.bundle data data

ALTERNATIVE EXPLANATION (by GRIN Wolfsong)

Go to Start -> run -> find the bundler exe and select it and press ok -> add "extract -r patch.bundle data data" after the last " and press enter.