I took the babe rankings for the past year off of FO. I then took out chicks that either I didn't like, or that had renounced the biz (like Bibi Jones, for example), and then narrowed it down to 64 girls. I then re-seeded a few that I thought were too low/high. I also looked at recent ranking lists and used to help re-seed some girls.
But for the most part, the babe rankings on this site were the basis for the seedings.