How to reduce image resolution captured by camera?

Hi,

I'm developing an application that captures images using the camera device.

The class CCamera doesn't seem to have a method for changing pixel resolution.

For example, 6630 captures images at  1280x960, but i need to capture only 640x480 images.

Please help me, i'm tring to capture a reduced picture of 640x480 instead of capturing a full image size and then reducing it. Is this possible?

Thanks in advance for your suggestions.