I'm not entirely sure on FEIDIAN.
FEIDIAN's documentation is sparse on inserting a bmp and color tiles. Even if it could, it won't spit out the palette in SNES format along with a tilemap to use an optimized tileset. That's where pc2snes earned it's stripes in my opinion. That saved a lot of time.
I would be interested to see how FEIDIAN would handle it, but I don't feel like investing any more time in this. Using FEIDIAN is a pain normally. GUI FEIDIAN like utility w/ preview windows anyone?