i think i accidentally found easier steps to unlock 1.1.2 otb iphone.
i havent tried this with 1.1.3 so i dunno u can try if u want.
here it is:
1. downgrade to 1.1.1, and jailbreak and activate it.
2. set auto-lock to never.
3. install : -oktoprep
-BSD subsystem
-and 1.1.2-1.1.3 OTB G-Unlock( this will unlock ur phone, and should take 3 to 5 mins)
( u still cant use the phone)
4. upgrade to 1.1.2 and jailbreak, and insert ur sim.
5. finally, install iworld and choose ur country..
and u have an unlocked 1.1.2 otb iphone.