First things first, make sure you are up to date on all of your packages,
yum update -y
Now you should install the FTP module
yum install vsftpd -y
Start the service
service vstfpd start
Now you will need to install Perl for the webmin qui to manage vsftpd
yum install perl -y (this is most likely already installed)
yum install perl-CPAN -y
yum install perl-CGI -y
Install the vftpd module for webmin
login, go to webmin, Webmin configuration, Webmin modules, from URL and enter: http://blog.shawnhyde.com/FILES%2f2013%2f12%2fvsftpd-2009-04-30-1755.wbm.gz.axdx
refresh webmin, go to services and vsftpd to configure it.