In the rpps directory of the CD-ROM there are a number of series files (named *.ser) which define series of packages. To install all the packages in a series use rpp-install-series:
# cd /mnt/cdrom/rpps # rpp-install-series 60math.ser
rpp-install-series is a small perl script that simply parses the series file and executes rpp-install for each package listed.