The Pioneer NEX series are fantastic upgrades to modernize an old Boxster. You can upload your own wallpaper and change the button lighting to match the car. The GPS works great. It supports a backup camera. There is a hack to allow all functions without the emergency brake.
https://www.youtube.com/watch?v=LxQDe0osxUA
I used the Euro Motorspeed kit, bought from Suncoast.
Suncoast Porsche Parts & Accessories Aftermarket Radio Installation Kit
The kit included everything needed including the radio removal keys. I wasn't happy with the directions which were one double sided page which started with "remove old radio" nor the electrical connectors with no directions. I ended up using twist on wire connectors.
Here is what the installation looked like and a couple screens. Graphics from this link.
https://www.youtube.com/watch?v=W2cbj-7J38M
