computer power supply to run deck and amp

I am trying to setup a garage stereo and have a bunch of car audio laying around so I figured this would be easier route to go. I was curious if I can run a car deck and amps off a computer power supply (s)?

I know the deck draws around 15 amps max and I have a power supply that has 15 amps on the 12 volt rail. so i think this would work.

My question is the amps draw a lot more and no power supply has 1 rail that puts out enough. Can I either:

A) run two of the rails in parallel to get more amps? or

B) Run two power supplies in parallel?

Also any assistance with the wiring would be great.

Thank You

I think yellow and black is are the 12V rails in the PS.......  I have gone inside and taken all the yellows and all the blacks and soldered them respectivley to a deans connector.  I then take that to what ever I need to power.  I havent given much thought to whether they are additive in terms of over all current or if they will see an equal load......  but mine works.  If it is a new style PS.......  you will have to have a jumper to turn it on.  I just use an old style with a plunger switch on it, dosent need to be hooked up to a motherboard to turn on.

If you run two different power supplies you may run into some issues.......  Ground reference with the two units may be at a different potential.

One PS should do the trick........

Licto