We need enough juice for you to connect via usb cord. The other suggestions deal with installing a backup but If you have not made one with rom manager then that idea is shot. The updat.zip you are trying to install; if you did not name it right (ie if you have windows 7 and you named it update.zip then it will read update.zip.zip because window 7 put the .zip automatically) then we can noot use the zip file on your sdcard.