Oblivion ESRB Re-rating Interview

Gamepolitics has published an interview with Maeyanie, the woman who created the controversial topless mod for The Elder Scrolls IV: Oblivion. As you might recall, it was this particular mod that triggered the ESRB to re-rate the game from "Teen" to "Mature".
Q: What did you discover about the skins/models Bethesda used when you started work on the Oblivion mod?

A: I discovered a few interesting things. For one, most of the skins and model parts are shared amongst all the races, the skins are just tinted. Also, the skins included with the game have all the, ah, "features" you see revealed with my mod already on them, so I didn't have to do a skin myself the way I expected. I'm guessing that's what the ESRB meant when they talked about this in the re-rating, but Bethesda was right, it really was impossible to do without third-party software.