Just wondering if someone can drive a S2000 in drivers training w/o a roll bar.
The hoops behind the seat are made to hold the car in event of a roll over.

 Not only do the roll bars have to be structural components of the car the drivers and passenger helmets must be below the top of the bars. we have found that unless you are extremely short your helmet would not be below the bar.
I know that we do not have any instructors that would be able to qualify.
 Unfortunately this is the situation with the honda and dodge viper and others.

Put a bolt in HARD-DOG bar in it ;)

http://www.bethania-garage.com/s2000.htm

Im borrowing my friends S2000 as well for the driver training. It also doesnt have a roll bar but it does have a Mugen hardtop. Does this qualify? As far as I can remember I remember the miata guys need a hardtop for trackdays if they dont have a bar so I dont see the S2K being any different.
Also my buddy is going to order a set of track R comps with rims but probably wont be here till after the driver training... Can I run with 3 month old Bridgestone Blizzaks snow tyres??? I realize the grip level will be alot lower but it makes it more predictable and would exagerate the dynamics of the car (just like how skippy or jim russel run street tyres instead of full slicks on open wheel school cars)

  The fiberglass hard top will keep you warm and dry but will not support the weight of the car. therefore you will still need a bar that will do this and be high enough to keep your head protected, see previous post.
  Some track day groups will allow this hard top configuration to run.
 we require the approved rollbar.

R Stec
RDC chairman

Hey, we have a stock seat & seat belt you can bolt in
your Miata for driver training instead of the S2000.
Just an Idea. You can come pick one up or even get Tom to install it for you.

 To reply on the Blizzak snow tires, while not recommended would be OK .
   these tires would be fine in wet weather, in the dry not so much.
   Being a relatively soft compound to grip on ice and snow in cold weather, in a dry track situation they will overheat, slide around and be burned off by the end of the weekend.
While sliding all over the place is great for drifting or learning car control you will quickly become frustrated by having to struggle through the corners while your  fellow students just zip through them.