smart scart selector

[Krepticor]

I'm looking to re-create one of ben's unspoken triumphs, his 10 position scart selector

here is a link,
http://benheck.com/12-18-2006/super-scart-switcher" onclick="window.open(this.href);return false;

as you may have noticed there is not much help here, I would like to be able to get as much information as possible to re create this beauty

Thanks!
~Krepticor