It's in the forums.. Search the forums for the Spirit 1.5 Beta release.
Here's some screenies:
This shows mainly the reflections, plus I wanted to see if it would lag, and nope, no lag whatsoever, and my PC barely runs HL2!
And Here's a Screenie of the wicked Fog effect in work!
Plus the new version also allows mp3's to be played in the game! so forget wav files!!
EditAfter researching the forums, I found it:
http://www.whiteplasma.com/confused/pub/files/Spirit14to15alpha3.rarThe latest fgd file can be used for this.