I have an old bootrom 3GS that is jailbreaked with 4.2.1 iOS.
Since I didn't use Greenpois0n to jailbreak, how can I still get their custom boot logo? I have downloaded some (well I was thinking) possible necessary apps from Cydia to do this, like Apple Boot Logo, but I do not get the custom boot.
How can I get the custom boot logo without Greenpois0n?