The guy who created that site (and the transformation pack), Chris (a.k.a. flyakite) is a friend of mine. We've been into the OS X / Aqua emulation scene for a very long time now (at least 4 years I think). Check out https://www.aqua-soft.org.
I Have This Flyakite Installed On My Comp .it's Good. My Comp Became Little Bit Slow Though. IT'S ONLY 30 MB SETUP. MY COMP LOOKS REALLY COOL.
nice website ... but i wouldnt anything like that on my pc .. cuz mine is already draggin its feet ..