Upgrading from 4.2.2

Hi,

I am a little new to this, but have been checking out the tutorials etc on Jailbreaking my ATV2.

I bought it new today and it has 4.2.2 on it. If I save my SHSH blocks can I use that to upgrade to 4.3 or 4.4.4?

If so, how?

Which version would be better for running XBMC?

 

Thanks,

Cranky =)

 

 

Blobs are unique to firmware and to the ECID (each idevice) you cannot upgrade or share blobs

 

The latest XBMC works good.