I've tried to us: fe.do_nut("nuts/" + fe.list.name + ".nut"); and it didn't work I'm afraid.
I've also tried to play about with signals previously and failed miserably. My experience with scripting is basically copying and pasting what has been done previously but manipulating it to try get it to work. Anything from scratch I'm pretty useless.
Print to console the fe.list.name variable and see what the result is.
I don't know how to do this, apologies.