RE: 96 HID's fit 94?
They fit, but some minor modification is required. Nothing difficult. The car's light housing, that the lights attach to, needs to be trimmed for the hids to fit in there. The hids have a square shape where it's predecessor halogens have a round shape. You will need to nibble out a little bit of the car's housing so the new "square" will fit into the old "round". The housing material is something like carbon fiber, lightweight and brittle. A dremel would work good here; myself, I drilled a series of holes then nibbled out chunks with a pair of pliers.
Also you will need to splice the hids into the low beam wiring. You still use halogens for the high beams.
Also, you can do the "Able-mod", (I believe that's what it's called) which allows the high beams and low beams to be on at the same time when high beam is selected. You simply splice wire at connector 15(power from light switch on/off) to wire connector 13 (low beams from switch at turn signal). Both connectors are on the turn signal in the steering column(both wires are part of a multi wire connector). Normally, flippng on high beams turn off the low beams(primarily to keep 4 halogens from taxing the altenators ability to recharge the system, fortunately the hids use much less power than a halogen)the mod bypasses the switch and powers the low beams at all times the lights are on.
EDIT addition: To adjust the hids, from what I read on here, point car at a building about 25 feet away; adjust so sweet spots are same distance apart as actual hids are on car; adjust height so top of sweet spot is equal to top of hid lens; adjust to straight ahead direction.