At first I had tried using the rot13ed letters as "portals" to go around the original grid. That almost worked, but missed the (6,6) in the tail of the R.
Then I tried overlapping the rot13ed letters, but that led to too much of a mess.
I knew I was going to have to traverse a path with the "walls" blocking me, but didn't know how to arrange the pieces. I eventually did figure it out though - overall, very fun puzzle!
@Deusovi Yeah, I'm sure it could. They don't have to be ads for things like other SE sites - as I understand it, you can advertise pretty much anything there, even if it's something you're involved with.
And there we go, exploring that site has just inspired me to post one of those very rare PSE questions which is actually a question rather than a challenge.