any1 knows how do i remove brands like vodafone from my k800i? on the main screen, on the bottom right should write "Menu" but mine writes "Vodafone". any ways 2 fix this?

ic.. looking at the 1st post, there stated that a site containing firmwares for the k800. but the prob is, which 1 should i install? and how do i install it to my phone? i'm scared that if i wrongly flash it, my phone will gone kaput..