Download the radiocity processor fsrad(so you can create lightmaps): ( NOTE THIS IS NOT NECCESARY ) FSRad: http://www.megaupload.com/se/?d=SK01EZZQ Extract this archive into the folder where you installed GTKRadiant.
#4: Start GTKRadiant and select GunZ Online as game. Configure path to point to where you created your working folder(in step #3). #5:The only textures missing are ones that would never be of any use without the original model such as car textures. The pack still contains 161 textures for you to have fun with.