Seriously, I don't understand why people pay so much attention to step I-III score while considering applying to dermpath. We've had this discussion recently, so let's not start to argue on how important scores are.
From what I've seen and heard, the application process looks something like that: you go to a program with dermpath fellowship, find out who is really in charge of fellow selection process, get multiple abstracts/publications, rub elbows with the faculty, get a letter of recomendation from a field leader, backstab other dermpathwannabe residents (there will be many, so protect your own behind), and go for it. Your best bet would be to make yourself indespensable in some way: i.e. if you are doing an important project with dermpath faculty, this is one incentive for them to keep you around for the fellowship. If you somehow strike out at your own program, then cast a WIDE net, apply nationwide, cross your fingers, and have a plan B. I've seen multiple candidates who applied to numerous programs without getting a single interview.