Fanx Mallycat!
But I can't really get it to work.
I've never used VBA before so maybe I'm doing it wrong.
I opened a new workbook and selected Tools/Macro/Visual Basic Editor.
Then I right-clicked on Page1 and selected Insert/Module.
In the Module1 I pasted the script you gave me and saved it all.
(Sorry if the menus and other stuff isn't correct english, 'cause I'm translating from swedish)
See http://danielh.com/test.jpg
When I open the workbook I got no promt. So far so good. But I also open it on a computer with Excel that has NOT got Morefunc installed. And .... no promt here either. So I don't think I got it right.