So, in my lasts posts I was complaining that I cannot jailbreak my 4.4.2 using tutorial " JB ATV2 with 4.4.4 installed - after apple stopped signing "
I tried with different cables,usb ports,computers etc…Everytime I was getting error 1604 when was trying to restore the signed IPSW (with those 2 dmgs injected)
Well, I finally found a way to jailbreak my 4.4.2 
What I did ?
I restored it at 5.0. After this I built signed firmware with ifaith using my saved blobs. (browse for shsh blobs). From the next option I chose download it to me. After the download was complete I chose “build ipsw”. Didn’t clicked “proceed” and I closed ifaith. In the end I got on my desktop “…_iFaith_Apple_TV_2-4.4.2 (9A336a)_signed” (ISPW signed but without those 2 injected dmg’s). I restored that version and I was back to 4.4.2 again.
The final step was to restore with the signed 4.4.2 firmware that I generated using tutorial: " JB ATV2 with 4.4.4 installed - after apple stopped signing "
No more 1604 errors !
ps: after the restore it’s done you need to boot your apple tv in tethered mode with seasonpass.