plot.autoKrige and standard breaks for coloring

plot.autoKrige does a nice job of laying out the predicted surface, 
the standard error and the fitted variogram (over the sample variogram).

Is there a way to set the breaks used for coloring the prediction 
surface so I can get the same breaks across a series of plots?  For 
example, with spplot, I can use 'at' to set the breaks at standard 
locations.  I can set col.regions with plot.autoKrige, but I can't 
seem to set the break locations.  Can this be done?

Thanks,
Mark