I just installed my PIAA's into my euro xenons. I must tell you, it is prolly wayyy easier to install these while the housing is sitting on your lap haha.
Also in the DIY there is no mentioning of making sure the PIAA stamp(on front of the bulb) should be facing upwards. Good thing I'm not a moron and could pick that info up from the japanese instructions. Just watch out or you could put the lights in upside down if you don't pay attention. Not sure if they would work incorrectly or not but the pictures said to do it, so I did.
Anyways great install guide.
retired 06 E90 325i
New: 09 VW Platinum Grey Jetta Sportwagen 2.0T SEL w/DSG, panoramic sunroof and Ipod adapter