The following example uses cp to copy a single file from the /cdrom/solstice_sysmgt_2_3 directory into the system's working directory (denoted by the ".").
$ cp /cdrom/solstice_sysmgt_2_3/README . $ ls -l -r--r--r-- 1 pmorph users 4618 May 9 08:09 README
To overwrite it, you'll need to change the permissions with the chmod command. See "Securing Files (Tasks)" in System Administration Guide, Volume 2 for more information on using the chmod command.