for what? can you be more specific
I've yet to try it, but supposedly the 3.5mm headphone jack on the front of the F90BT is an A/V jack, so you can run both sound and video into there by going to AV2 on the screen of the stereo.
you also need an inverter box to power up your console.
Easy, $20 fix. I've been using a PS2 and inverter in my M5 for years, running to an old Pioneer CVA1005 and it works great. I've got a similar one in my X5, but since the F90BT can play movies, I mostly use it to power a laptop and then use my phone to provide WiFi for whoevers using the laptop.
Hmmmmm, I like playing video games more than the next guy, but I don't know if it would be safe driving while playing video games 
Huh? Coming from another person who has a car stereo in their dash than can do GPS and movies via SD/DVD just like everyone else on these forums?! Just because it's in your line of sight doesn't mean you have to watch it. While I do watch movies on long 6+hr roadtrips (for those reading this, please save the flaming), I would never play games...but that never stopped my friends and/or kids in the car from doing it.