How to permanently set the Adobe Reader user the option to print a picture?
I am really not sure what you mean. As far as I know, they simply print the PDF page. If you are talking about printing to PDF, they have to have Acrobat, not Reader.
I'm sorry but I know little English. I mean that in the print properties permanently mark the print options as image
The "Print as image" or print as picture is a sticky setting for a printer. If you will once check this option ON, it will remain ON for that printer till the time un-check it.
Is the option not behaving as the above mentioned expected behavior?