here the way to get it working on touchpad :

1) install game

2) reboot device

3) copy this file in the app directory (/media/cryptofs/apps/usr/palm/applications/com.gameloft.app.dungeonhunter)
http://www.multiupload.com/TZC2KSX2N7

4) always launch the game in PORTRAIT mode, otherwise it will crash at start

this method may works with other games from gameloft and more !
(Dead Runner, Art of Glow, Glow Hockey, Dungeon Hunter, ...)