Aqueous Cream is no longer recommended as a leave on moisturiser, as it contains sodium lauryl sulphate SLS which can cause irritation and potentially skin thinning.
As previous posters have said Flexitrol and dermatronics heel balm are both effective at dealing with cracked, hard rough skin, however for routine use the OP may wish to look at ointment type products for very dry skin, often best used at night and cream based products for day time use.
Keeping skin well hydrated is important as good skin integrity helps prevent skin damage and hence reduces the risk of ulcers etc.