BIG eletrical/alternator problem PLEASE HELP

Hello everyone. I have a problem with my 96 talon tsi awd. about a month ago the car started to die while i was driving on the highway. it just lost all electrical power, but when i gave it gas it would turn back on and continue driving. it eventually died and i had a mech fix some wires. the new problem now is the car still doesn't seem to have any power. the other nite driving home it died. i took it to a garage and they tried replacing the alternator, but the new alternator was not receiving a charge. they then tested my old alternator and it was fine. this seems to be a big electrical mess and im not getting too much help around here from the local mechanics. i also have two amps and a capacitor hooked up to the car, but the mechanics told me that they would not cause this problem. also, before the car died these two other times... if i left it in the driveway for 4-5 days and didnt disconnect the battery, then the car would not turn over and the battery would be dead. im guessing i have draw somewhere, but i have no idea of where to even begin to look. any help would be appreciated. thanks!

I posted under your other thread in the non-performance forum.