if you follow all 7 steps you can dl a trial here: http://prodesigntools.com/all-adobe-cs5-direct-download-links.html
and activate with your serial.
if you have a problem dl'g, you didn't follow all 7 steps. the most common error involves failing to meticulously follow steps 1,2 and/or 3 (which adds a cookie to your system enabling you to download the correct version from adobe.com). so, your browser must also accept cookies to enable these downloads.