Have posted my question at Acrobat Windows: http://forums.adobe.com/thread/480959?tstart=0
The only answer was that i have had chosen the wrong forum...
So because of that queue for uploaded files please follow the link above and advice asap. Any kind of help would be greatly appreciated!
Acroabt JaaScript has the 'app.popMenuExec()' method that allows for a pop-up within a pop-up. There is also a dialog object that could be used but that object requires a lot of coding. If you want to use the diaolog object look at using a 3rd party product to generate the diallog code, like Windjack's AcroDialog.
It is not the best approach to post executable or what appears to executable as a download file for security reasons.