All you need to worry about is the XF86Config-4 file. Don't worry about the other zipped file. The XF86Config-4 file is located in /etc/X11/. Open it and sroll down to the Screen section. In it, you will see several SubSections. Each one, the highest resolution will probably be 800X600. For example: Modes "800X600" "640X480". Then just add the resolution you want to each subsection. For example: Modes "1024x768" "800x600" "640x480". Make sure that you root when you do this. Then save it and restart the computer. The XF86Conig-4 file is read whenever a Desktop is started.