A1200 tower and ATX PSU

[theformula]

HI I am building a tower at the moment and I am running my cd drive and floppy drive from an ATX PSU. I am running the psu by shorting it with the green and black wire. I want to be able to switch it on from the front of the tower.  I have tried with the wires and the switch provided with the tower. The problem with this is i have to hold down the switch to keep the psu powered. I want it to work normally so I just press it once and it stays powered then press again and it stops powering it.

I was also wondering is using the black and green wire good for this or are they other wires? Will mediator work with the black and green wire used ?(as I am getting one soon).

[theformula]

Thanks for the speedy reply. I think i will leave it hotwired until I get my mediator ( I am right in thinking the mediator supplys the mobo so no need for two power sources?).I am gonna go for one with an atx plug. You have cleared up all my main questions in one post. Thank you indeed kind sir  :-D