I haven't read through every single post, but I will post my advice.

I believe you can, but you need to take it very slow.

Start at the micro stakes games. After something like 10k hands, when you are sure you can beat it, move up one level. Play 10k more hands, and so on.

Get pokertracker to track your results, and prove that you can beat a level. If you simply are not beating that level, either stick with it, or drop down if your bankroll dictates it. If at any point, you realize you cannot mentally handle the inevitible chip swings without going on tilt, give up.