How to you launch the batch?
Put the batch file in the root of the flash drive name it like install.bat, next when your installing windows vista or 7 after you press install now and it generates that dvd error message, press SHIFT + F10. This will bring up a command window. From there, change the directory to the flash drives by guessing which drive letter it is, its usually E: on most computers but type E: in the command window and once you get E:\ type DIR to see if its the flash drives directory, if so, Type install.bat and the batch file should come up and just hit the respective operating system you would like to install. Then you can close the command windows and press the X at the top right of the vista/7 install so it goes back to the start of the installation. From there just hit install windows now and it will go though just fine.