Hello out there I have successfully JB my 3G with 4.1 and RedSn0w. But i want to upgrade to 4.2.1 again with RedSn0w. I have downloaded everything, but im just worried about, that the iOS version im trying to download thru iTunes is 4.2! I cant run the cracked iOS that i downloaded with redsn0w in iTunes. Can i simply just install 4.2, and then use the 4.2.1 JB ?? Thank you !!