I don't know much about electricity yet... but it sounds like a pretty simply job.
That's the last phrase of someone gunning for the Darwin award.
Seriously, playing with electricity that contains enough amps to kill you outright is NOT something that is recommended, unless that is your job and you've got education to back it up.
Not at all, ampere don't kill you. Even heard about someone being electrocuted by a car battery? I guess not. And you can easly get hundreds of Amperes out of them
Electricity starts to be harmful at about 50 Volts.
BTW, PSU are not transformer, they are AC/DC switching units (note the plural). You can't just connect some of them together, you'll just end up frying all your hardware.