Micro computer power supply help

[GiraffePencils]

Hey, I've got my hands on a micro computer which only has a 4 pin ATX connector for powering it. now I've got it up and running by plugging a traditional PC power supply into it and shorting it with a paperclip to get it to power up (the power supply that it) now there has to be a better way of doing this, can someone tell me if i'm being a retard?
is there a better way of getting a PSU to power up without the 20/24 pin connector being connected?

 

[GiraffePencils]

swapping it out with a switch sounds like a great option It's just that the board only has the 4 pin connector for power:
http://www.google.co.uk/imgres?imgu...e1yUbX1FebF0QWCvoGAAg&ved=0CF0Q9QEwAg&dur=237
one of those. and I was wondering if there's a better way to do it. I have a psu i'm messing around with but will buy one when i've worked out the best way to power it. Are there any PSU's that don't need the 20/24 pin connected to power up?

 

[GiraffePencils]

pico psu is a 20 pin connector, this does not solve my problem of the 4 pin not receiving power unless shorted