A load-append mc5 (and reciprocal save-selected node(s) to mc5) option would be useful I think.

It would be a Pro feature though... no doubt about that.

Once you've loaded your appended node(s), you'd have to manually wire them up.

I can't think of a way you could reliably load a string of nodes into the middle of an existing node network, and automatically wire it up, in a way it would always make sense / work in any given shader.

It can be scripted on a per-case basis. Look at Zev0 and draagonstorm's "Vascularity for Poser" product as an example of this.

But, as a generic function... I don't think you could do that?

I don't think you could even construct a load-append options pop-up screen that would make the wiring-up any more intuitive than just going into the advanced mat room.

But... you could however have a generic function that just appended a string of nodes but didn't hook them up to the nodes already loaded... and that would be handy... and I can't imagine that, in itself, would be too difficult to add into the existing code?