How update to 4.3 without deleting



How can i update my Atv2 with Seasonpas and AT Flash to the new version without deleting all and installing all new. For example after jailbreak i have to install the new ATV Flash and add all new settilngs in XMBC

As far as I know you cannot, The process of updating to iOS 4.3 wipes any trace of aTV Flash and XBMC.

Will we ever be able to update to 4.3 or any updates for that matter without having to wipe out the ATV each time?