how can i adapt this power supply?

hi, i have a pc power supply. it has a 20 pin motherboard connector. i'd like to rig it up with a on off switch so i can use it to power projects as the dual voltage out put is rather handy.

This might help ATX to Lab Bench Power Supply Conversion

Mike

koo, thanks. i figured it out though, it was so simple i feel like an idiot. i simply had to jump the green wire to a ground wire and the thing turns on.... lol. sweet, now i have an awesome 300watt psu that can supply 3.3, 5 and 12 v DC!