Php, RSSreader, etc. etc

Please don’t mock me, I’m both a newbie to DreamHost and web design.

I’m using dreamweaver (again, don’t mock) and trying to install an RSS Reader and feed to my website.

I followed the instructions from this site, where I downloaded the RSS reader extension:

The one thing I wasn’t sure about, however, was this command:
“To use this extension, you must have php with XML support”

So, obviously, this isn’t working out. If anyone has a moment and understands such things, does DreamHost have the above requirement? Any ideas why it’s not working?

Thanks, and please be gentle…