Best way to design tables for cascading on my form

My company inspects damaged cars for insurance purposes. Up to now,
(relating to this issue) I've had tblDamageArea populate a list box on my
form where the user can select the various parts of the car that were
damaged. I've had this list include parts for multiple kinds of cars and I'd
like to make this list cascade to include only those parts relevant to the
car type inspected.

I've created a tblVehType to separate Sedan, Coupe, 4DoorTruck, SUV, etc.
which populates a cbo on my form where the user will select the type which
will then be used as the criteria for cascading the list box.

Before that, I created tblParts w/ the Parts but then also had each vehicle
type listed out w/ Yes/No boxes where I then selected which parts go with
which veh. This is where I'm really needing help. I know this isn't the
best way to do it but can't figure out how else at this point to use the
tblVehType and connect the related parts to each veh.

Many of the parts are the same for all of the vehicles -- for instance the
front end parts - they all have bumpers, fenders, hoods, windshields, etc.
but the doors (2 vs. 4), quarters (or beds), and rear ends all vary. I
imagine that I'll use a query to put them all together for the list box but
what is the easiest and best way to set up my tables & dictate which parts go
with which vehs?

Thanks for your help!

Pamela