via MacOSXHints.com on 4/1/08
The new icons in Leopard can be up to 512 pixels wide, but you are still limited to viewing them at small sizes in the Finder. By making a few small edits to some system files, you can make the View » View Options panel's icon size slider go up to 512 pixels, in order to show really big icons.
In your favorite text editor, choose Open... from the File menu. Type Command-Shift-G to enter a path to open, and paste in this path:
Now that you have the file open, use Find to search for com.apple.f...
The new icons in Leopard can be up to 512 pixels wide, but you are still limited to viewing them at small sizes in the Finder. By making a few small edits to some system files, you can make the View » View Options panel's icon size slider go up to 512 pixels, in order to show really big icons.In your favorite text editor, choose Open... from the File menu. Type Command-Shift-G to enter a path to open, and paste in this path:
/System/Library/CoreServices/Finder.app/Contents/Resources/English.lproj/ViewOptions.nib/objects.xib
Press Return to open the file.Now that you have the file open, use Find to search for com.apple.f...
