follow the guide except instead of Trucha Bug Restorer, on a virgin 4.2 you have to use TBR mod... search for it here... other than that.. follow the guide and you are good to go~!
if you do not use TBR mod... you will not be able to downgrade IOS15 properly. (which is the initial step in TBR)
alright, i'm going to try and run with the stuff on the guide, and if that doesnt work i'll get the modded TBR. I wasn't able to install bootmii as boot2, only as IOS. Also, i only had 2 bad blocks, i guess thats good?