I searched for days, it took me 1.5 days total but this was the best and clearest instructions I found:

http://www.hacktheiphone.com/112/iph...nlock_mac.html

I didn't write it, I just used it. Hope this helps someone, I'm now running 1.1.2 unlocked in the UK with Vodafone.

THIS IS NOT FOR UK PHONES OR ANY PHONES THAT COME WITH THE 1.1.2 OUT THE BOX, SO DON'T BOTHER ASKING HERE!

Instructions on that site are always clear with pics. Those are the only ones i use. Even a retard can follow those and get through them.