Hi,
I simply did an rpm -e on all rpm's that were installed before,
and it seemed to roll back the installation very clean.
It even removed the acid Alias in httpd.conf,
by removing S??AcidAlias under
/etc/e-smith/templates/etc/httpd/conf/httpd.conf/
So here is the sequence that worked for me:
rpm -e ari-mitel-acid-1.1-0
rpm -e trevor-mitel-guardian-1.0-2
rpm -e snort-mysql-1.9.0-1snort
rpm -e snort-1.9.0-1snort
Until now, no bad consequences seen....
Regards, rené