Sorry Ryan, this is not currently possible due to the fact that the cameras in the SX10/12 are aligned internally with the scanner optics. This critical alignment is how the software knows exactly which pixels from the pictures (shot from onboard cameras) to apply to each point captured in the point cloud.
For more on this, check out
this thread.
Several people have asked about this possibility. Perhaps Trimble will consider a way to do this. It would likely require the user to align all point cloud data sources within a specific tolerance, prior to colorization, to avoid incorrectly colorizing areas due to cloud-to-cloud shift.