For th iPod you are going to want to buy some wire taps and tap the wire's into the phone power cable under the center console. It is pretty simple to do, I have some info. on my site (sig.) if you want to see how I set up my iPod.
Also, all Boxster's came with a spoiler, and if you want to see it go up or down, there is switch in the driver's footwell on the fuse panel cover. You could also install a spoiler indicator light if you wanted to just so you know when it is up or down, and a dash switch to control the spoiler from the dash.
