Capn Bloggs:
That's not the way thousands of these approaches are flown. The FMS is used to fly the NDB approach; no "overlay" or "title" necessary. The primary purpose of FN26 and RW26 is to facilitate the FMS flying the approach. The final descent path is coded at 3° from FN26 to RW26. You are welcome to fly 3° raw data from FN26, but you may may well pop out above the PAPI at the MDA. If I didn't have a DME or FMS VNAV profile to follow, I'd be going down a bit/earlier than FN26 just to make sure I got to the MDA before it intercepted the GS ie Dive and Drive.
You are correct for those who have the necessary AFM and other authorizations. Lacking that an IAP like this one requires monitoring of raw data; i.e., the NDB.