Yes very possible.
Here's the mod I did.
I've since realized the TS vitality overflow marker was broken and have fixed it to work in my next release.
The trick here is that each OverflowMarker auto show/hide is dependant on having AdventureXP and TradeskillXP named parents. Only 1 of these parent objects will be visible based on the right-click setting.
The workaround I came up with was to include both bars in both parent pages. The tradeskill marker inside the AdventureXP page gets named something else. Likewise for the adventure marker inside the TradeskillXP page. The original markers then send visibility commands to their counterpart in the opposing page. Example...
Code:
AdventureXP
AdvBar
OverflowMarker
OnShow=parent.parent.TradeskillXP.AdvOverflowMarker.visible=true
OnHide=parent.parent.TradeskillXP.AdvOverflowMarker.visible=false
TSBar
TSOverflowMarker
TradeskillXP
TSBar
OverflowMarker
OnShow=parent.parent.AdventureXP.TSOverflowMarker.visible=true
OnHide=parent.parent.AdventureXP.TSOverflowMarker.visible=false
AdvBar
AdvOverflowMarker