To install rpm files, use the rpm command. Most likely you need to run the following:
Code:
rpm -Ivh libwhatever.rpm
View the man page for rpm for more information (man rpm).
Cheers,
Josh
---------- Post added 03-04-11 at 06:45 PM ----------
To add to my post though; what distribution are you using? Most likely you can install what you need from your distro's package manager.