Jailbreaking / downgrading - NEED HELP

Hi all - knew to this forum and jailbreaking but know how to get around a pc fairly well.

 

Basically bought an apple tv 2 - has the latest software installed 6.2.

Have tried season pass and installing the IPSW however it comes up saying "This apple tv is not eligible for this version" been told it may be because i am on 6.2 version. can anyone give me a hand on what to do and if i need to downgrade back to 5.3??!??!

I have downloaded the update 5.3 (i think) but unsure how to actually downgrade my apple tv.

Any help would be much appreciated thanks.

Maybe you'll find answers here:

http://forum.firecore.com/topic/12368

http://forum.firecore.com/topic/12370