Forge94

Hi,
Ive just put quake 3 arena on my nexus.
Since there is no physical keyboard, I mapped the volume up button to walk forward, trackball as aim and pressing the trackball to shoot. It works nice, however the trackball is not sensitive enough.
Does anyone have a solution to this problem? Is there somewhere i can adjust the settings for sensitivity?
If you dont kniw what im talking about, google quake 3 android and go into the google code page. Is about the 3rd one down (kwaak3)