ZT-180 latest version?

[biasaf]

Hey,
My current version is :
"android2.1-update1-20101103"

Kernel version:
2.6.32.0 usbandroid#1608"

Builder number:
"1000ET-eng 2.1-update 20101103"

Used 1126 Beta Rom v3.

Downloaded from here Free File Hosting Made Simple - MediaFire.

I would like to know if there is anything newer..
I saw there is 2.2 on zenithink.us site and i downloaded it but didn't know how to install..

Thanks!
I'm new to this ><