Rolling the fenders is pretty basic, just take a baseball bat or pipe and wedge it between the tire and the fender. Then you just use the leverage to roll the lip up. There is a good chance the paint will chip when you do this, due to the flexing.
My fenders are rolled, and I also took a grinder to the inside lip to cut that back a little. If you do this, make sure to sand smooth. You can't tell unless you stick your head in the wheel well.
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Jared
www.DrivingWhileAwesome.com
'72 tii
'00 Tacoma PreRunner