I see that I can choose to install "ROS Only", "Base" or "PR2". Can't I install them all and use them all? Thanks for your advice, SamQ _________________________________________________________________ The New Busy think 9 to 5 is a cute idea. Combine multiple calendars with Hotmail. http://www.windowslive.com/campaign/thenewbusy?tile=multicalendar&ocid=PID28326::T:WLMTAGL:ON:WL:en-US:WM_HMP:042010_5