Specify original msi install location for msp file using a command line switch
Try msiexec /i \\serv\share\NewRVT2014.msi PATCH=msipatch.msp /qb, pointing msiexec to the new location of your .msi. This may un/reinstall Autodesk, or just patch it.
Another thing to try is placing that .msi back into the location the clients are looking for, that may or may not work, and may or may not be scalable depending on your environment.