links to PowerPoint

[Tyler]

I often create links from Excel models directly into
PowerPoint presentations with the Paste Link menu option.
However, when I want to replace a model (model_old.xls)
with a newer version (model_new.xls), it would be very
helpful to see all the PowerPoint files that depend on
model_old.xls.

Is there a way to do this in Excel? The Audit tool
doesn't seem to work and I can't find a way in the help
menus or on the web.

Thanks,
Tyler