Aaaaannnd...
We have our first candidate for "why the search function doesn't always work." Found Drak's cool-sounding tutorial. No pics (that MIGHT be my browser, mind you... it wasn't loading something else earlier, either). The information is still useful, but it'd be a lot clearer (especially to visual learners) with the pics intact.
Another option, which I'm sure you've come across already, is the topographical map-then-rout option, like in the "Les Paul the Hard Way" tutorial found HERE, which is likely the method I'll be going with.
The grider option sounds good, and the results speak for themselves on Perry's website; however, I AM one of those visual learners I mentioned, and at least with the gear I have here, I can't picture how it's done, exactly.
Cheers,
Greg