How do I chroot a user in proftpd?

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http://serverfault.com – I installed proftpd 1.3.4e successfully. I have compiled it, and did the make install part but I want to configure it, don't know how to do so. I want when logged in to be in /var/www/html/ I followed this tutorial: http://www.webune.com/forums/how-to-install-proftpd-linux-centos.html I have centos 5. Would anyone tell me how to configure it, to be working properly so I can connect using an ftp client? (HowTos)