PW3 : Collection => ugly image

Hello,

Do you know if it is possible to add an image (cover or other) to a collection ?

I have :

Collection 1
...Book 1
...Book 2
...Book 3
...Book 4
Collection 2
...Book 1
...Book 2
...Book 3
...Book 4
Collection 3
...Book 1
...Book 2
Book 1
Book 2
Book 3
Book 4

And it is really ugly to have the folders with the name of the collection...

Do you have some suggestions?

Thanks :xmas: