I have a PRS 12-string (along with a Takamine acoustic 12), and I will admit that stringing like a Rick would be a fun experiment, but impractical to do "just for laughs". So I bet the number of folks who own a PRS 12 (which is small) who want to purposely switch to the Rick string config (which is not the common practice I assume for a reason, so again a small number) is a very small Venn diagram representation.
Swapping the nut, plus the tweaks to the saddles on the bridge (reversing the relative intonations), would not be a quick task.
If you try it, please do report back here!