You need
sn0wbreeze-V1.5.1.exe
iPhone2,1_3.1.3_7E18_Restore.ipsw
and
iPhone2_1_3.1.2_7D11_Activated_Custom_Restore_iLik eMyiPhone.ipsw
Make with sn0wbreeze custom firmware from iPhone2,1_3.1.3_7E18_Restore.ipsw -> Restore with iTunes just maded custom firmware. Phone must be working - check if you still have modem 5.11 - if it's 5.11 - all is fine - put phone in restore mode and flash with iPhone2_1_3.1.2_7D11_Activated_Custom_Restore_iLik eMyiPhone.ipsw |