I don't see how adding a background image would help with readability or ease of use. It just memory wasting coolness.
For an idea of how it would help with readability take a look at your cable or satalites on-screen tv guide and then imagine all those grids without the grids.
But it really dosnt matter, I looked into adding images to palm apps and its extremely cumbersome, very restrictive and should really be delt with by the Palm OS devs.
The labals don't have a colour attribute and I can't control the colour when they are displayed. I'd have to switch to a different, more difficult, method of displaying to show colour.
Yes, I also looked into changing colors on labels and as far as i could tell the regualer old palm labels dont provide for much customization at all.
From what I've gathered today the Palm platform is a very aweful platform to develop for, thank you for making as much as you have on this app ^^