I found this a while back and considered trying it but I am unable to find a shop still selling the screens here in the UK, anyway here is the link. there is a circuit diagram just over halfway down the page
have fun, when you finish it could you post up somehting on how you got on so I can see...
Thought you might find this useful for keeping the hight down, it is a small pci card that turns the slot 90 degrees you can get left or right facing ones too.
http://www.maplin.co.uk/Module.aspx?ModuleNo=36928&1&source=14&doy=24m5
> higher riser...