Merging Toolbox Configs?

[Solidmold]

I receive several machines with toolbox components from other Sw users. Since I continue to work on them I was trying to found out a way to add those external toolbox parts into my own Toolbox. I don't want to copy them since I use configs for other machines that the external files don't have.

Nice would be a merge Toolbox configs when opening external part.

Any ideas?
Daniel