i jtaged my xbox a few months ago with xbr 8955 theres lots of new stuff out i wanna do but i need to upgrade my software to freeboot 9199 whats the easyest way to do this? do i have to dump the nand again and write kv?

this little program is your friend. he can convert your original nand or xbr-nand to the latest freeboot. then you just have to write it to your xbox

EDIT - to use it you need your CPU key. to get that, turn your console on using the eject button and xellous will show you a blue screen. wait for the fusesets and take a photo of them. fuseset 3 + fuseset 5 gives you a great big string like 1ED4AFC81BE645583EDCB3F053747C48. this is your CPU key