REQUEST: Possible to auth HD podcasts using username/password?

iTunes is funny.

I'm not sure if it works the same on Windows and OS X but iTunes continues prompting for a username/password for all password-protected podcasts even if you click 'Remember Password'.  (it will remember your username/password, but you still have to click OK everytime it refreshes!)

Would it be possible to add a username/password HTTP GET parameter to avoid this?

Example:  
  http://www.giantbomb.com/videos/feed/hd/?username=sofakng&password=hidden
  http://www.giantbomb.com/videos/feed/hd/10/?username=sofakng&password=hidden

Right now I've created a PHP script using libCURL to perform authentication for me and avoid this problem:
  http://myserver/getfeed.php?username=sofakng&password=hidden&podcastId=10 (ie. subscriber videos)

I'm just wondering, but is this against the terms of service for the website?  I absolutely do not want to get in trouble and I really don't see anything wrong with what I'm doing but I really want to make sure.