"Necropolis" - changes to creatures of levels 6-7.

Ah, no, I don't understand:

If the exe file contains a reference to an icon through the visual element, how should we handle that?
If we replace the visual element of the Wight with that of the Death Knight, everything will be fine.
But the original visual element of the Wight is also needed – it's used instead of the Dragons.
So, if we change the icons of the Wights, won't that immediately affect the Wights at level seven? And how can we handle this with copying, I can't figure it out?

Let's say the exe uses the path visual/wight/icon. The same path is also used instead of the Dragons – and it's the same one. Replacing this path will change the icon – but isn't the icon the same for both?