How to set multiple folder icons in finder (for symbol- and list-view)?
To change a folder's icon just:


Open the image you want to use as icon, (with Preview, for instance). Select it all, or the part of it you want to use, and Copy it ( Command + C ).
Right click on the folder and choose Show Info ( Command + i ).
Select the folder icon image, and Paste ( Commdand + V).




Doing it this way, no matter in which view you'll be displaying the folder, the icon will be the image you've pasted.