Just been through this one!
Not as easy as it looks for starters. As des said, you need a bl**dy strong anchor point for the winch, then you'll need an extended fairlead so that the anchor doesn't dig into your toobs and worth having extra bow cladding.
Personally after nearly breaking my back the other week as I'd got the anchor wedged in a load of weed and about 20 succesive manouvers trying to dislodge the bl**dy thing........I'm all for anchor winches!!
Have also made sure that everything is in place on the new rib so that I can easily add it at a later date, should I not have any daft mates around when one needs pulling up! (Skippers rules: though boughtest the boat therefore though shalt not lift anchor.....or anything heavy for that matter!)