how do i install plesk after installed Discuz!exp

[coolhugo]

Discuz!exp-->Plesk 8.1 for windows

discuz!exp was include:
apache 2.2.4
mysql 5.0.37
php 5.2.1
zend optimizer 3.2.6
phpMyAdmin 2.10.0.2

i already installed discuz!exp,now i install Plesk 8.1,but i want to use above services i installed
what can i do??

Thank you