since I couldnt' configure the proxy beforehand (it ignored my IE settings), was actually go the web - on the server, which was tragically funny, and download the zip file with pl content.
Then I manually put it in the place it would normally reside, and then I was actually able to get to the settings on the SIM to enter my proxy settings and see the files I wanted to download.
I would suggest an idea to be able to configure proxy settings during the SIM setup and prereq check.
For example:
(install directory) D:\Program Files\Altiris\Symantec Installation Manager\Installs\Altiris
- this is created when you install the SIM.
Place the file - symantec.pl.xml.zip, which is downloaded from the default website - http://www.solutionsam.com/solutions/pl/symantec.pl.xml.zip
Your install will still not proceed, but at least you can get to the screen on the SIM where you can enter your proxy credentials. Then you can install whatever you need.