Im extremely experienced in emulation, Ive used every emulator from the early Mame (arcade emulator) to the GBA emulator for Palm pilots. I even have one of the original Bleem retail cd's.
I considered using a PS2 emulator, a PS1 emulator, an XBOX emulator,a Nintendo Game Cube Emulator, as well as Sega, Atari and several other systems. My intent for this program was to make the car computer as independant of other hardware as possible. All of my movies that I have are all DVD rips and only occupy 250 to 600 megs of space each, so I no longer use the DVD drive. I have about 6 gigs worth of mp3's on my car pc. And with the Nintendo 64 emulator -> I have over 300 games, which only takes up another 3 or 4 gig, each file is from 5 to 32 megabytes. In researching the emulators mentioned above; I found that PS2 Iso's (ripped games) take anywhere from 2 to 8 gig each. So on the average 40 gig hard drive, I can only get a couple of games on it. I found that PS1 Iso's (ripped games) take anywhere from 300 to 600 megabytes each, again on the again on the average 40 gig hard drive you can only get a couple dozen or so games on it, The XBOX and Nintendo Game Cube emulators are still in their infancy and only play a couple of available public domain games, and their CD formats are not pc based so to rip a game you have to place the XBOX or Game Cube on a computer network and use special software and configurations; These games also take up to 8 gigs each of hard drive space. I felt that the XBOX and Game Cubes werent even worth considering. I also found that the PS1 emulator was poor in graphics and load time and 30% of the games wouldnt even run on the most reliable emulator. My decision to run the N64 emulator was based on the fact that you can get hundreds of games on a hard drive and run them at a very high quality video with low requirements at very high speed. They load as fast if not faster than the actual console, and The emulator is fully compatible with windows joysticks, where I ran into problems with the PS1 and other emulators. If there are some really excellent games for PS2, XBOX or Gamecube that the user wants to put on their car pc. Most likely the game was ported for PC as well, and its just a matter of installing the game and then putting it in the external apps module.