help!! photoshop and stylus (bamboo pen and touch)

[doctorjames]

I have just become the lucky owner of a new bamboo pen and touch from wacom as a birthday present from my other half.

Using the dodge and burn tools in photoshop I can only seem to make the pressure change the width of the tool, and would like to have it control the exposure (more pressure more exposure)

Does anyone know if this is possible?.. im using CS4 extended.

Thanks in advance

James