Hello Claus66,
The best option to make this move is to stop the Altiris Service (and dependant services, including the AltirisSupport service, as it watches over core services and would retsart them within a minute), move the folders out of the ProgramData location, make the junction and move the folders from the temp location back to the PRogramData location (which will now be on the e: for real).
Restart the services and your NS should not see any difference (almost).