Can someone please tell me how I can make a cable for a PS/2 Keyboard, so I can plug it in on an USB port, or how to fit a USB Male Adapter to PS/2 Keyboard. Please, don't give any links to sites where I can buy USB Keyboards or PS/2 to USB keyboards, but please give me a link to a tutorial, or tell me here how to do this, which wires to connect.
Thank You.

USB and PS2 are totally different beasties i'm afraid :-(

it's not as simple as just connecting pin to pin with a cable, there are some quite advanced electronics needed,

even though both connectors may have 4 pins, they're totally incompatible, in simpler terms,
the one could be speaking french and you're plugging it into a device that talks only english, you need a translator in the middle to stop each side attacking the other :-)

you can buy USB to PS2 adapters, and I think you can buy them the other way round too, though i'm not sure,

I reccon 10 minutes in the ubiqutous google will bring some results.
good luck!

and p.s, if you want to attach a keyboard or mouse to the xbox, it'll prolly be cheaper to just buy a USB keyboard or mouse and hack the cable up!

Well, ok I thought I would get that as awnser, i looked around myself for the pin outs a little, and also noticed they were completely different, I'll just see if i can find a little cheap usb keyboard then, still to bad, I was hoping for a little bit of practise, thats the main reason I asked. So it could have been a tutorial or something, well thank you, i'll go visite Alternate

Nope, I have already tried this. PS2 to USB adapters for KBs and Mice DO NOT WORK on XBox. Sucked too, only USB KB I have in a MS Natural KB and I HATE those.. but it was the only thing that worked.

But yes they do in fact make both adapters, PS/2-USB and USB-PS/2.