Could you tell us where you got the PSM rpm from? We would then have a better chance of telling you how to go about it.
Edit - Actually - forget the above. I've been to
RPM Resource. Does your downloaded file end in
.src.rpm? If so it is a source rpm and when run will create an rpm for your system. If it ends in
.rpm without the src it can be installed by typing
rpm -ivh <packagename>.rpm.
I did notice though that there are a number of dependencies which will need to be installed beforehand.