If you're using GPxPatch, you can edit the keys.ini file to change the keys for acceleration and braking. Just be sure to change the car up/car down/in car view/tv view keys to something else.
Or take some acetone, rub of the imprint from your keys. Than use a permant marker to label them the way you want to have them. You can thus turn "a z , . " easily into cursor keys.