Alternator/generator/regulator problems of the 2003 Dodge Neon

I have been having problem with my car for about 6 months. One of the problems were my high beams will operate but my low beams wouldnt. Now my high beams will operate but I am unable to switch to my low beams. The second problem is with my battery dying several times which resulted in getting a jump from another car. I end up having a battery and alternator replaced on my car last year between Nov/Dec 2010. Just recently I noticed smoke coming from my steering column located near the steering wheel and the smell of something burning. This happen while I was driving. My car didn't start Monday 3-28-11 morning so I had it towed to the dealership where I bought the car from. The mechanic had to replace the battery. They ran a diagnostic on the car but no readings regarding electrical problems. The important question pertains to what is draining the battery.

The contact stated the engine stalled and died at highway speeds. When this occurred there was total loss of power. The vehicle would not restart. The vehicle had to be towed to a dealer. The dealer replaced the battery, alternator, and the power train control module. The dealer has been unable to accurately diagnose the problem. No further repairs have been made at this time.