I can't seem to get the radio and the GPS to work simultaneously on the DA100.  I am using NavFree.  Am I missing something in a setup file?

tia

Double click the home button on the radio and choose to mix in the radio. Single click again to bring the menu back down. 

Thanks, that worked.  Is there any way to make it permanent?  Everytime I strat the truck, I have to mix it.

No, it will reset every time you turn the car off. There is no option to change that setting.