embedding graphs in power point

[CMD]

Hi

I have a bunch of graphs in an excel document. I use them in a lot of
different power point presentations. I use the function copy/paste
special/paste link.

For the most part this seems to work fine. The problem I have is that the
excel document is constantly getting updated and as a result the file name
changes. This disrupts the link I have created for the graph in the power
point document.

Can someone suggest how I change the filename and have that change reflected
in the power point as well?

Thanks.
Chris