I've made a patch that might be useful for others. In the attached  

patch you can open a pd-file and the main window prints all the  

abstractions or externals that you need to make the patch work. It  

doesn't detect abstractions within abstractions though and it also  

prints objects like [5] or [$1], I didn't find a solution for this  

(small) problem yet. (I'd think it is bad pratice to use [5] in  

sted of [5(  or am I wrong?)

I wanted to make a patch that copied all the necessary abstractions  

and the file itself to a new folder but I ended up with this  

simpler solution...