combining custom & database valuelist

Would’nt it be wonderfull if we could combine the custom valuelist with the database valuelist?

So in the custom-window we place:

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and in the database valuelist we show all our employees. So the valuelist will become this:

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Ann Derkson
Jan Blok :wink:
Stef Compeers
Harjo Kompagnie

I know it can be done by scripting the valuelist ourselfs, but than you have to rebuild it every time a employee is added. It would be nice if it worked right out of the box.