OK, I've released several updates recently that I didn't bother to note here, including (of course) updating the Info Center with GU25 info, but the update I just uploaded is actually pretty significant.
I've added a walk-thru for "Blood of the Brood" (a.k.a. Hoo'loh's Hat Quest). More importantly, I've added walk-thrus for all the quests in the Peacock and Claymore series. (Thanks, Tasi, for doing about half the work for me!) Since I didn't want to add 60 buttons to the "quests" button column, and didn't have room at the top of the window for another tab or two, I had to get creative.
You can see what I came up with in the attached screenshot. There's a single button for each of the series in the main "quests" button column, but if you click one of them, a second button column appears with buttons for each individual quest in that series.
So, yes, the Info Center is now set up for tertiary menus.
-- Darryl (Milquetowst)