If I load up a game that's never seen this ESP before, the getstage command returns 0. Perfectly normal. If I then type setstage tiberiaquest 10, then getstage tiberiaquest, it returns 0 again. Also, the quest does not appear in the journal. I've obviously done something wrong somewhere, because these commands worked before I started messing with objectives. Because of this, the dialogue does not appear on Vilkas, and I cannot test the rest of the quest (as I'm certain I've done something wrong with the radiance).
If it helps, the ESP can be found here: http://www.mediafire.com/?tp2d3tneaavjd2y
Overview of intended quest progression (objectives match up with stages):
Spoiler
I also have no idea how to set the quest to stage 40 once all three fragments have been collected (all three have separate forms).0:
10: Start quest (after reading book, not yet implemented), Talk to Vilkas
20: Find three fragments
22: (bandit lair, replace boss with dual-wield Tiberia [replacement not yet implemented])
25: (warlock lair, replace boss with battlemage Tiberia [replacement not yet implemented])
27: (Forsworn encampment, replace boss with spellsword Tiberia [replacement not yet implemented])
30: Talk to Brynjolf [optional]
40: Give fragments to Vilkas
50: Talk to Tiberia
100: Ty disappears, receive spell, finish quest
10: Start quest (after reading book, not yet implemented), Talk to Vilkas
20: Find three fragments
22: (bandit lair, replace boss with dual-wield Tiberia [replacement not yet implemented])
25: (warlock lair, replace boss with battlemage Tiberia [replacement not yet implemented])
27: (Forsworn encampment, replace boss with spellsword Tiberia [replacement not yet implemented])
30: Talk to Brynjolf [optional]
40: Give fragments to Vilkas
50: Talk to Tiberia
100: Ty disappears, receive spell, finish quest
Help would be greatly appreciated.