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you must have a custom firmware to do so, and this is not a guide on how to install this for DevHook.
Link to the site with the cheat device download by Edison Carter:
Link for the site to download WINRAR to view the Cheat Device files: http://www.download.com/WinRAR/3000-2250_4-10007677.html
The exact line to put into your game (or game.txt) document, just copy and paste this in there (this can also be found in the readme file in the Winrar download of the Cheat Device, but this is easier to find):