How can I switch the weather layout in Beautiful Widgets from clock/current conditions mode to forecast mode?
Beautiful Widgets installs a bunch of individual widgets that can be used. The one with the clock and weather is the "SuperClock" (or "Beautiful Home", maybe) widget. It sounds like you just need to select "Beautiful Weather 4x1" when picking a widget (unless the lock screen widget thingy doesn't give that choice - is that the case?).