Oh SHEEET. What I get for giving you shortcuts, LIKELY what happened is the field wire is shorted to ground and burned up your old regulator. Either that or the field in the alternator is shorted. However, you said you had it tested and "good." So either the alternator is good, or the guy that tested it doesn't know what he's talking about.
First thing the, is to disconnect the alternator field wire and check resistance of the field to ground there right at the alternator. Better yet pull it off the car so you can inspect.
I hope you didn't do too much damage. Does "anything" still work? Lights?
