that`s sounds remakably like a Gammon joint, in which case a great way to cook it is to wash it 1`st then boil it in a large pot with Leeks and carrots and a t`spoon of mustard powder, some bay leaves.
boil it for about 2 hours.
then remove it and allow to cool, cut this thickly and put on fresh crusty bread with english mustard.
with the stock remove the bay leaves and any ppercorns you may have added, then throw in some potatoes and celery and make a soup/stew for next day, a little double cream added works great too.
although with the stock, that is entirely up to you what you use it for, just don`t add any salt :)
So long and Thanks for all the Fish ;)