I just found this great thread over on the OMF (Outdoors Magazine Forum) posted by British Red which goes through the production of fruit wine (in this case blackcurrant) in great detail and with excellent photos to back it up. The process is still ongoing and there is plenty of other advice for using wild berries too.
OMF - Food, foraging and recipes - Blackcurrant Blog. Subject description: A "watch it happen" real time guide to making wild wine
Be warned,you will want to rush out and buy a demijohn