Chained Select dropdown nav using custom taxonomies

My head is hurting from this, and I'm afraid this may be more advance that I'm capable of doing right now. But here it goes.

I have set up 4 custom taxonomies for my custom post type in wordpress. No problem.

I even set up my select menus using get_categories where each select menu populates with all of the options for that taxonomy. That list updates as I add more taxonomy values. Again, no problems there.

What I would like, is that each post, will have one option from each of the 4 taxonomies.

The 4 taxonomies are:

1) Type (i.e. ATV, Motorcycle, Snowmobile, Watercraft) 2)Year (i.e. 2012,2011,2010) 3)Make (i.e. Suzuki, Honda, Yamaha) 4)Model (i.e. RM250, YZ125, CRF450)

The goal is you chose your type option, say Motorcycle, and than the year populates with all of the year taxonomy values that also have a type of motorcycle. You than select your year, and the Make populates with all of the makes that also have that year and type, and than you select your make, and the model populates with all the models that also have that make, year, and type.

And then after you select your model, it loads that post that match all 4 taxonomies. There will only be one post that can possibly match all 4.

My head has been spinning with this problem I'm dizzy. Somebody please point me in the right direction.

Thanks all!