help! is the issue my alternator? electrical nightmare

[tastyratz]

ok so heres my story. my alternator in my car was not charging very well and at idle all my lights would go dim/wipers slow down etc. I had to get several jumpstarts with this and i was sick of driving without my radio or anything electrical in fear of draining more than its weak output. Battery would hold those charges fine and is about a year old odyssey batt. My friend gave me his sohc alternator awhile ago and ive had it storing outside for like a month then inside for awhile. I finally got time to put it in the other day and everything ran great at first. i took it outside turned on everything electrical and my subs all the way up and nothing dimmed i was happy. the only thing that flickered is when i hit the breaks the interior light would quickly flicker but they used to just get really dark. every time i let my foot off the break though the brake warning light would go on. i drove down the street a few blocks and died right after. i had to get a jump which got me about 1 min down the street and i died again. the car was sputtering and running like shit then everything electrical went nuts. i had dash lights that were very bright, i had headlights and an interior light that was very bright but the car wouldnt start unless i had a friend charge it and hold that there awhile. i have no clock but the backlight lights. my radio flickers with and without power at times, i cant get my keys out and my wipers are going on when i dont tell them too. did i hook up the alternator wrong, is it bad to begin with or what? anyone else experience anything like this before? i gotta figure this out today cuz i have to get to work in the morning still! thanks