Hi,
You can take it to a panasonic service centre and they will do it for a nominal price.
And since most of the BD's getting released now are region free or Region A (if it's the US version) I guess modding is not so mandatory, unless you plan to get your's BD's from UK or plan to get a region C BD locally. Cause, all the BD's which I've right now are either region free or region A, hardly any are region B/C, and in future also i guess most of it will be region free or region A.................so at the end of the day the modding dosent help me much. So based on your preferences, make your decision wether you want to mod your player or not. Again this is just my thaught's, so one can decide for onself.......... and I know a lot of people relay on UK's amazon for BD for price factor as opposed to US amazon, in that case you need to mod the player.
ENJOY!!!!.
cheers.