As for those 192 line modes, I don't really know how they work with 15kHz, as they would need something like 90Hz to get near. The only think I could imagine would be actually 192pixels per line, 240 lines per frame.
*EDIT* Actually it IS exactly that way. (If you double the 192 pix width you end up with 384x240)Hm... Some resolutions are pretty much bogus...
704x513@60Hz (nclubv3) is just the resolution the system (ST-V) could output, but the game itselt just outputs 384x224

1024x1024 also seems pretty much like some kind of "don't know" resolution.
671x216 is quite weird, but should fit nice into 720x480 or 640x240
504x296 should be possible, maybe added as 512x296 or 512x300 for better compatiblity.