I did too, about a year ago
check out this thread:
Anyone have hyper white or Hid kit for their boxster?
Works great so far, only complait is an ocasional battery light when you switch them on, which goes away after pushing a spoiler button (dont ask me how its related). Im sure it can be fixed with a cheap relay kit but im too lazy to even mess with it since it works.
Great update over stock halogens, but not as good as the HIDs on my A6