need help creating sound bar

ok i am trying to take my old boombox stero speakers aswell as a computer subwoofer that i have lost the power supply to. i plan on taking all the speakers out of the boombox setup and creating a sound bar to mount above my headboard so i can create somewhat of a surround sound and then have the subwoofer off to the side. what im wondering is how do i get power to the speakers and how do i connect them to the tv. the subwoofer ran off a power supply so i figure i can do the same for the old speakers.
thanks for the help

fail.

Dude, you can't just slap any old speakers in something and call it a day. There is MUCH more science to home theater speakers than you obviously are aware of, little things like properly designed crossovers to start. Here are a few places to check out where you can do a proper setup for your price range: Speaker Design Works, undefinition, HTGuide Forum - Mission Possible DIY, and DIY Speakers and Subs - AVS Forum