After trying to add the sample company data for GP10, and log in back to GP, got below message. To fix the issue when tried to run the utility , it would not let me to mark check box before Sample Company Name and so could not proceed. After checking SQL log fine two entries in dynamics..duLCK table. Deleted them, allowed me to re-run the utility for TWO.
Those who are first time adding sample data check this Microsoft KB http://support.microsoft.com/kb/913819