Bingo!
[root@localhost ~]# rpm --install /home/amckay/kerio-kms-6.7.3-7892.linux.i386.rpm
Thank you for installing Kerio MailServer 6.7.3!
Please consult LINUX-README file for essential instructions on how to operate KMS in Linux operating environment.
To view the README file, type
less /opt/kerio/mailserver/doc/LINUX-README