u kno...i want to do that in my camry too (5s-fe 92 le w/ sunroof) yeah...get the power inverter... my install is planned out like this...
1. micro-pc case set up in a "shock-proof" set -up, bolted down in padded plexiglass enclosure --Like an amp.
2. small keyboard (it lights up and itz clear and all...check out those gamerz pc magz) mounted on the glove compartment so when you open the compartment its right there--an example would be the airport seats and how they fold down to become ur tray....u got it?
3. ten-inch touch screen mounted in dash.
4. radio, antenna kit routed to the computer
5. ecu moniters and comp hook-up to ecu
6. dvd-rw drive mounted in the glove compartment....(burnin cds and dvds while i burn rubber lolz)

7. 100 gb hard drive--stores lotz of mp3s
8. creative audigy platinum 2 sound card...24 bit sound-oh yeah
9. nvidia geforce ti 5500 not exactly sure about the model #
10. mri motherboard and an intel celeron rated at 2.5 ghz