How to split apache (web server) and tomcat (web application server)?

Hi,

we are using Tomcat in BO4.0 environment and we are SP2 Patch 14.

we are facing some issues with the Tomcat performance and  some times it is taking so much time and reports are keep on loading.

i have gone through the below document "Improving the User Experience in SAP BI Platform 4.0 with Apache and WDeploy" but not sure how it will help us in improving the performance..

http://scn.sap.com/docs/DOC-6191

Can any one kindly brief us how we can implement .

Thanks in advance.

Regards,

Prasad