I tried to delete everything via yum fromt he gpl virtualmin(i removed webmin..msql..bind..etc etc(aka everything) before i installed virtualmin pro.
This is not an indictment of virtualmin BUt if you want to install the pro version wipe the box compoletly first(reinstall and reformat). you'll save yourself a ton of headcaches. I hope you all ge the virtualmin gpl to virtualmin pro figured out. It unfortunatly totally knackered my machine.