Once you have root access to the phone, you can go to \system\app directory(on my moment anyway, directory structure should be the same) and cut the .apk files you don't want and paste them to the sdcard. BE CAREFUL. Don't remove anything but the unwanted apps, you can brick your phone by removing the wrong .apk files.
You will need a program called root explorer(paid app) to do this. Make sure you mount the apps directory as read/write(there's a button in the upper right corner of the screen), otherwise you won't be able to cut the programs.