How do I remove the Atomic packages?

[fran@]

I used the Atomic Repo (without Plesk) to upgrade php while we were using Plesk 8.6.
I've now upgraded the server to 9.3, and PHP to 5.2.14.

Now I'd like to go back to use the standard Centos5.5 packages instead of the Atomic ones.
When I try to remove the .art package for PHP, yum wants to remove102 Package(s), including Plesk psa packages:
:
yum remove php-5.2.14-2.el5.art

Dependencies Resolved

================================================== ================================================== ================================
Package Arch Version Repository Size
================================================== ================================================== ================================
Removing:
php x86_64 5.2.14-2.el5.art installed 3.4 M
Removing for dependencies:
php-devel x86_64 5.2.14-2.el5.art installed 2.8 M
php-zend-optimizer x86_64 1:3.3.9-1.el5.art installed 5.8 M
psa x86_64 9.3.0-cos5.build93091230.06 installed 31 M
...
Transaction Summary
================================================== ================================================== ================================
Remove 102 Package(s)
That's not what I want.

How do I remove only the .art packages?

nmap-4.85-1.el5.art
php-5.2.14-2.el5.art
php-mcrypt-5.2.14-2.el5.art
atomic-release-1.0-11.el5.art
t1lib-5.1.2-2.el5.art
php-zend-optimizer-3.3.9-1.el5.art
mysqlclient15-5.0.90-1.el5.art
mysql-server-5.1.48-1.el5.art
php-common-5.2.14-2.el5.art
php-pdo-5.2.14-2.el5.art
php-gd-5.2.14-2.el5.art
php-devel-5.2.14-2.el5.art
mysql-libs-5.1.48-1.el5.art
php-cli-5.2.14-2.el5.art
php-xml-5.2.14-2.el5.art
php-imap-5.2.14-2.el5.art
spamassassin-3.2.5-1.el5.art
php-mbstring-5.2.14-2.el5.art
mysql-5.1.48-1.el5.art
php-mysql-5.2.14-2.el5.art

/Fran

[fran@]

the info is at http://www.atomicorp.com/wiki/index....wngrading_rpms