However, that labor has borne fruit: I managed to get four listboxes where if you click one entry, the other entries on the same line become selected as well. This involved wrangling an option I'd never heard of that allows multiple selections to be selected, and I'll provide details about my work when I get home from my job. I'm thinking about actually turning it into some sort of mega-widget, too.
Very tired lately, but at least it's for a good reason. Life isn't about relaxation -- and if it is, maybe you're doing it wrong.