Sort of. You copy update.zip on sdcard, turn off the device and hold all of the top 3 buttons(power home menu) until it says upgrading.
Wait for install to finish and wipe data cache and media from menu. Reboot and enjoy.
Note that reboot actually results in power off . You just turn it back on.
Enjoy.
Sent from my HD2 using XDA App
Do I have to extract files first? or do I use directly?
Thanks you have beeen a lot of help