That picture is the same seadoo that I have. Here is what I was thinking of doing.
1. Relocate the gauge to the area below the handle bars (where it says gsx). That will leave me enough room to place a small screen there. Also the hood has a slight overhang to block the reflection of the sun.
2. Remove the front cargo container. This area stays dry even if the whole front end of the doo goes under water. I will build a small system using a laptop hd, slim cd-rom, small atx MB. I plan on contructing a small waterproof case that will fit in the bottom of the cargo container. There are 2 fresh air tubes that run into front of the hull. I can tap into these tubes to displace the heat from the cargo area and mount a large fan under the hood.
3. Mount a waterproof trackball beside the relocated guage.
4. Mount GPS reciever in the area between the handlebars and the hood.
5. Remove the glass from the side mirrors (those mirrors are useless) and fabricate waterproof speakers into the mirror mounts.
I am not doing this because of the "wow" factor. I really would like to have gps because I ride on some large lakes and the speed from the gps is more accurate than the speedometer. Sometimes like to listen to music while I ride.
Things that concern me:
1. Battery- I might have to upgrade the size of the battery for powering the amp,dooputer, and still have cranking amps
2. The chance of something catching fire. The cargo area backs right up to a 15 gallon gas tank
3. Running 60mph and being able to hear the speakers over the sound of the ski and the wind.
4. Amping the audio to a decent listening volume. I don't want it blarring out across the lake but I need to be able to hear it.
5. Quickly controlling the audio level and complete system shutdown for emergencies and getting pulled over by the patrol boats
6. Shock proofing the hd. I love to launch the ski off wakes and sometimes the landings are anything but predictable.
Thanks for your input!!!