Trusted PDFs and Javascript

Is this possible and if so what is required to make it work.

Currently if you place print(false); at the document level and save the file.
Every time you open it with Acrobat 8 you get a message telling you that the
document is trying to print. This was not the case with version 7 and I
understand all the security issues.

If you create a script like this:

printFile = app.trustedFunction( function ()
{
// Additional code may appear above
app.beginPriv(); // Explicitly raise privilege
this.print(false);
app.endPriv();
// Additional code may appear below.
})

Save it in the javascripts folder.

Then call this trusted function printFile(); at the document level you do not
get the message. This is fine but a pain if you have to make each version of
acrobat that you want this to occur on have the script installed.

I've been looking at certifying a pdf and having the Embedded high privilege
JavaScript turned on within acrobat. Could I certify a pdf and when the user
opens the pdf if they agree to my certificate the pdf will print without the
print message coming up?