you can't get out of the car until you pass that street level. as far as I know, the proton pack on the crate is just for detail seen as how you loose all your weapons at the end of the street level (hence the ecto gone from weapon 1) if you want out so bad, use the warping cheat too skip the level…if you want all the weapons, use the weappon cheat…that's pretty much all you need too play what they have done anyway.
too enter these…
1. stop walking around
2. look at the keyboard and pay no attention to the screen
3. push the keys that corrispond too each character of the alphabet…“A” for A, “B” for B and so on.
idclevXX (mentioned elsewhere, it works, just type it in, replacing XX with the level number)
idkfa (self explanitory, use it for the weapons my non-dooming compodre's…heck, I grew up playen this and wolfenstien)