So I did try out this code and on the first try it did process on my top folder,

but it only combined the first file in the subfolders with the open file.
On the next trys wich happened on the top folder and the subfolders it did nothing at all.
On about the forth try on the top folder it posted runtime error '5937' and now it's doing nothing again.
I tryed deleting the code again and pasting it in there again, but that didn't help.

P.S.: Sorry about the unformatted code. I don't know why it's doing that. In trhe preview it's always looking the way it should...