Updating Library Feature Across All Referenced Parts

Hi,

I've created a library feature and applied it hundreds of times to several different parts.  I now have been asked by the client to change the diameter and length of this feature.  I tried changing the diameter and length of the library feature itself (which is itself a discrete part file), hoping it would be propogaged to all parts in which I have dropped this library feature.  Unfortunately, that did not work (nothing changed in the parts to which I had applied the library feature).  So far, the only way I've found to change the feature in question is to directly edit the features within the part's design tree (not the design tree of the library feature "part"....the design tree of the parts to which I've applied the library feature).  I'm hoping there is a global method of changing one setting and having it applied automatically to all referenced parts.  Otherwise I'm stuck manually editing hundreds of these features.  Is there a way to do this?

Aaron

SolidworksParts And Features