Thanks for the feedback. I have resigned myself to the fact that I can't use Mapsource. Getting back to the original 5.00.7 problem, I have been on the road for the past week (over 2000 miles). Mobile Pc would freeze every couple of hours. I finally went to start config and disabled all of the startup processes. Mobile PC stayed up for over 7 hours on the last day. There most be either a conflict with a process or possibly a memory leak. That would be for tech support to figure out. I am going to email them my latest error log.
Dave E.