Sure, the modem inf file is included with the driver package.
Please be sure you have the latest drivers, version 4.1.353.0.
If you need them you can get them at this link: http://www.digi.com/support/productdetl.jsp?pid=2495&osvid=57&tp=1&s=236
Redetect the modem and then browse to the directory where you have the drivers unzipped.