Yes, you definately need to install the SR.  It was not supported prior to that.  I agree, it seems that the lights should work regardless, but I do not know that for a fact.  The lights are on whether I am running Poser or not.  It worked for me straight out of the box.  I ran it for several days on the CD driver with no problems.  I did eventually download the new driver but it didn't seem to make any difference.  I would, however, use the new driver anyway.