Berserker, thanks!

Well, I needed that arbitrary nested subdirectories since it made more sense in my case.

I'm helping with fanofheroes' UI mod. This mod supports not only the UI from the origianl H3, but also the UI of 10ss, ACM and GEM. It's better to seperate these resources for different mods so the folder can be more organised.

Using SN:R is not very ideal as the fact that in 10ss, ACM and GEM, none of the graphics is in png. That says in order to use SN:R, duplicates of pngs have to be created (since SN:R for png replacement works only when the source is png, right?). That doesn't really make sense.

I believe something can be done to implement the subdirecty support for def replacement, for example, check for extenstion of the folder. But anyway, this is optional. I will just use the current directory and keep a list of files.