If you want to, go into the Finder's 'MENU' resources # 5 and 15, and change "Empty Trash" to "Cry Over Milk".  Then open up the 'STR#' # 128 and change the fifth text field to "Spill Me"

Open ResEdit.  Open the file of the icons you want, and the Finder.  Copy the 'ICN#' resource and paste it into the Finder