Before you actually install any fileset, you may want to look at its README file. The README file may contain some special or additional information about installing the fileset. The PE filesets are all shipped with a copy of the README as part of the first file on the CD. This allows you to view the README using the installp -i command and option.
If you decide after reading the README that you would like to refer to the file later, once the fileset is installed, you can find the README file in the /usr/lpp/fileset/READMES directory. The file will have a name of fileset.README.