My lover and I are both infected (I can only assume he is because we've been together for 5 months and didn't use a condom for most of this time) and there isn't anything we women can do for them.. the best thing the both of you can do is keep as healthy as possible by eating lots of fruits and vegitables, exercise and not smoking..
I'm a smoker and that is one of our BIGGEST problems is smoking.. it's just as important for him to quit because I guess all the bad chemicals and such are stored in the men's juices so when you are being intimate, he releases those toxins into you and that is less helpful to your fight against hpv cell changes and increases your risk for dysplasia/cancer.
Maybe your husband doesn't smoke, but it does come to show that he needs to be just as pro-active with his health as you do yours in order to insure that your health and safety is optimum.
If he is already infected, there's not much to be done.. men don't have the same impact that women do from this virus.. but at least help him understand what is going on with your body so that he won't have be so afraid or unknowing of what is going on.. His biggest fear right now would have to be catching warts (if you have any) and for your health.
Do some research with eachother. Have him ask his questions and then look them up in every article you can find and then that way you guys can both be familiar and more comfortable with the situation.. that is my suggestion anyway.
Physically, there's not much to be done with him.. but you can definately be there for him emotionally and I think the more involved he is, the better off both of you will be in your relationship.. but I'm not a doctor or therapist so don't sue me for malpractice
Good luck! hope this helped a little.. we're all in this same boat together.. the least we can do is share our thoughts, opinions and experiences, eh?