Beginner to scanners, what else do i need?

So i am a beginner in scanners and i would like to make my own scanner for as cheap as possible. I need help finding a cheap green laser module, that can ship to the US. It doesn't HAVE to have blanking but would be nice. I am taking the soundcard way through this. Also if i used the sound card i have shown(link below) would i just beable to wire the soundcard to the correction amp(need link please) and the amp to the galvos?

These are the parts i KNOW i need, but what else do i need on top of this? i believe i need the correction board which would wire to the soundcard and galvos, and then also the laser?
DealExtreme: $17.16 C-Media CM106 USB 2.0 External Sound Card Box with 7.1-Speaker SPDIF Optical Output
Galvo, Scanner, Scanning, laser show,laser projector at laserpic

gee...

use the search function or scroll down in the shows sections, lots of posts asking the same thing

....and read the stickies why dont ya, there is one titled almost exactly as you titled this thread.:twak: