Hello Didier,
Thanks for your reply and happy new year :-)
Yes I tried "runas" and tested your proposition, same issues:
"Add-SPShellAdmin : The term 'Add-SPShellAdmin' is not recognized as the name of a cmdlet, function, script file, or operable program."
The action pack for SharePoint works fine. If we could know how this actions works, action to run "SharePoint PowerShell" as "Administrator" could be build with the SDK. Right?
Did someone do this already....
Br,
Tom