We have been running SolidWorks from an admin image for the past couple of releases.  I have just created an admin image (using existing, working SW2011 admin image) for SW2012 SP 1.0 and tried installing it on a brand new machine and upgrading another.  Both fail with error messages 1603 (first attempt) and 1903 (second attempt).  Anyone have any suggestions on what the problem is??