Yes, Hyoss' description and screenshot were the precise culprit in question.
And many thanks as well to dt192!
As I said, I'm pretty new to LotRO, and honestly, entirely new to customizing it, outside of the game itself. I'm also not on terribly friendly terms with VS, though I'm sure I can navigate it with a degree of diplomacy.
Could you tell me which file I'm meant to be customizing? I'd hate to guess wrong and completely bork my install. (Not too large a fear. I'll of course back up anything I tinker with, but your wisdom could certainly save me a lot of jiggering and pokering.)