How to Hide Custom Icon Folder

I don't know exactly what you're aiming at, but to change a folder's icon, just open its info-window in Finder, then open the info-window of the file/folder you want to get the icon from, click the icon in the upper left corner of this window and select "Copy" from Finder's "Edit"-menu.
Then click the upper left icon of the info-window of the folder to change and select "Paste" from Finder's "Edit"-menu.

 

I do.

A common complaint with early versions of Leopard was that stacks would always show only the first few icons in the stack, potentially obscuring the purpose of the stack. (So the Documents stack would just have a bunch of blank file icons, for example.) As a workaround, people started putting icons to sort alphabetically ahead of the other files (named " !!!" or something) to force that icon to appear in front.

However, you no longer have to do this. You can right/control-click on the stack and select (Display As) -> Folder.

 

Wow, thanks a ton! I tried and tried to figure this out before the update and it just seemed like a hassle. Having given up, seeing this post was awesome!