your cid:52 the firmware is in the download section you can use K810i firmware if you want make sure it's cid:52 red.
yes you will lose all the vodafone settings when you debrand, but i made this unbranded vodafone custpack it contains all vodafone wap links etc, i used it when i debranded my vodafone k800i it's for use with EUROPE_2 (attached).