uh I just looked at the link out of curiosity but it looks like theres literally 2 things you need to do, none of which involve breaking anything...

Simply get hold of a HDMI/DVI cable and stick the ends into the corresponding holes of your monitor and PS3.
When you turn on your PS3 hold the PS button down to make your PS3 automatically detect output settings, that's it!
You can pretty much skip to the bottom of the guide about sound now.
then plug sound into your comp speakers...