I think that's wonderful that you want to try again!
First off, find a lactation consultant and have her visit you soon after you have your lo. Although the latch was fine, she can help you in the other areas as well.
Also, I'm not sure if this works for everyone, but I didn't use a single cream on my nipples. I didnt use soap when showering either. I just rinsed with water. But what I did was express milk on to my nipples after every feed and let it dry there. It makes a thin layer around your nipple and it worked wonders for us. I did get red from being used so much, but I didn't crack or bleed.
Have you read any books? There are some suggestions posted just recently and I think it's a good idea to have one on hand at all times.
Make sure you get lots of fluids and tons of rest. It will be hard with another one to look after, but this is very important to your success. Also, eat properly.
Use this site!!!!!
I hope this helps a little bit, but most importantly, find a lactation consultant... perhaps get a referral from someone you trust.