Here is a good tip for skin problems….
throw a handful of oats into the bath – they release a natural milk which soothes skin. Easy and cheap and effective!
Also, you could try Ecobaby nappies. They are natural, without bleach or chemicals etc and are really excellent. We’ve been using them for 6 years since we had our first child and they really do protect against nappy rash. You can order them online at http://www.ecobaby.com
They’ll even send you some free samples to try before you buy. They are very absorbent too, you get much longer than you would with a regular nappy from the local shop so they work out as being good value in the long run.
Good luck, hope that helps.