Download iBooty v2.1
iBooty v2.1 is automatically generated by sn0wbreeze jailbreak tool while it is doing its job building a custom IPSW firmware file. It should be located on desktop inside iBooty-for-4.3 folder. However, if iBooty-for-4.3 folder not found on your Desktop, you may download iBooty v2.1 here.
You will find iBooty.exe & files folder inside iBooty-for-4.3 folder. The files folder will contains ibss.4.dfu, ibss.4.payload, llb.4.dfu, notice.read, and s-irecovery.exe
Run iBooty.exe to start your tethered jailbreak device.