I'm not responsible for anything, and i recommend having a well charged battery
ok if you have this downloaded onto your phone (the main [root] of the sdcard) name it update.zip not update not update.zip.zip but update.zip
turn off your phone
restart it by holding trackball & power till it comes on
use the volume buttons to navigate to bootloader, then press power
again use the volume buttons to navigate to recovery and press power
once in recovery hold power and pres volume up to get the menu option,
then navigate to apply update.zip and apply... let it finish, and then reboot, voila should be done.