Filing the fork makes me a little nervous. Does anyone know of a site that has pictures and/or video of exactly how it's done?

Also, here's a couple of pics of the tire and how much it's rubbing. It mostly seems to be rubbing on the extra bit of rubber in the middle of the tire. The wheel itself is true, but the tire has the tiniest bit of up/down movement when spinning so it rubs a little bit more in certain places. These two pics show the best and worst of it. Does this look like something that could be solved by filing? I'd really like to run 28c Hardshells on this build, but I don't want to do something stupid and/or dangerous.