You can remap the keys in the config.xml file, which is in the "bin" directory.
Since the arrow keys providemore than just directional movement, I'm not going to provide a "how-to" guide. You're on your own as to figuring out what to edit and how to do it. Perhaps somebody else can give you exact details.
WARNING: Be sure that you save a backup of config.xml before editing it in Notepad so that you can restore if you make a mistake.
