First of all, you need to mount the CD to read ( if you haven't already ). It has many variations and ways but let me show you one.
mount = command
mount -t iso9660 /dev/hdxx /cdrom
iso9660 = cdrom type
/dev/hdxx is where your cdrom is attached to; e.g, hdc for first drive on IDE channel 2
/cdrom is the directory that your CD will mount to so that you can read files.
Then, for easier sake, just copy the program files you want to install.
cp = command
cp -p /cdrom/program1 /home/yourlogin/program/
-p = switch to creat the directory without needing first created
/cdrom/program1 = program name you wanted to install
/home/yourlogin/program/ = where you wanted to do the install stuff
Then do as Ralix had pointed out with
tar zxvf filename.tar.gz
su ( became super-user )