Big Interview With Regional Hr Director For Promotion.. Help! Professionals, Help!?

Help me!
Tomorrow I´m having a one-on-one interview with the HR Director of Latin America in my company.
Within the next six months, it is planned that I will be promoted into my boss´ role (I am an HR Analyst/Assistant and he is the HR Manager). They aren´t entirely happy with the work he does and the idea is to get me up and into his role before the end of August this year. I have a good reputation here locally, but I really need to make a good impression on this guy!
I am hoping that people could help me out with some possible questions that he might ask me, things that might be to my advantage to mention, etc…
Help!