I don't think anybody has posted up a tutorial or anything like that, but a few of our members have done it and hopefully they can chime in a walk you through it. A nice picture tutorial would be awesome!
For these jobs, I go to the paint aisle at Home Depot, and buy some plastic putty knives in various widths. Start with a thin one to get a gap started, then switch to wide ones. If you can't find the plastic ones, use a metal putty knife that's been wrapped with electrical tape.