1.0.2 04.03.13_G upgraded to 1.1.3

This iphone was unlocked at 1.0.2 but then messed up trying to upgrade to 1.1.1 and 1.1.2 a while ago and could only get it jailbroken. Now i have a i3gsim and it wouldn't work so i was going to try to upgrade to 1.1.3 and jailbreak and unlock, but my friend ended up upgrading it to 1.1.3 through itunes. i downgraded it to 1.0.2, but could find a jailbreak i could get to work and also can't restore to 1.1.1 or 1.1.2. I tried to just upgrade to 1.1.3 and then downgrade to 1.1.1 or 1.1.2 but i can only downgrade to 1.0.2 with ibrickr v.91

I'm guessing i need to virginize it but i haven't seen a way to do this without having it jailbroken, but i can't figure out how to jailbreak it. I've tried a couple different ways, but it won't work.