Blocking ports from upgrade

[Steven Lake]

	Just curious about how to block portupgrade from upgrading certain files when you cvsup your ports and tell it to upgrade everything?  I've got a few programs that refuse to work with the newer version so I have to copy the older version back in to make it work again.  I'd like to just block it from upgrading those programs until I absolutely must upgrade.  Is there some way to mark them as being port that should be ignored?  Thanks in advance for the info.