Cory,
I built the trigger from a kit purchased here:
HiViz.com: Learn High Speed Photography
The instructions that come with the kit are not detailed but luckily if you go to the website there are step by step instructions with photos showing where to place the various components. I bought the sound trigger with delay kit for just under 20 bucks and feel I've already got my money's worth.
One more thing. In my case the output from the sound trigger is going to a Cactus V4 radio transmitter to fire the flash wirelessly but you can also connect directly to the flash with a PC cable.
Bill