newbie with wheel bearing question

Hi to all. My missus 2002 freelander has a noisy front wheel bearing. I'm going to takle the job myself but just thought id put it to the experts on here........how difficult is it, will it involve any special tools and anything to watch out for? I'm quite handy with a tool kit and knowledge of machanical workings. Havent taken the wheel off as yet.....thought i'd aks before i start as i have been down these roads before and come unstuck only to ask all the questions AFTERWARDS
many thanks.