You can able to download webmin package through RPM only.
You can find the webmin RPM http://sourceforge.net/projects/webadmin/files/webmin/1.490/webmin-1.490-1.noarch.rpm/download
from this url.
Use following command for installing webmin
#rpm -Uvh webmin-1.490-1.noarch.rpm
This will install the webmin package on your fedora box.
Afer installation you will get following message.
Webmin install complete. You can now login to http://localhost.localdomain:10000/
as root with your root password.
Open this URL in browser http://localhost.localdomain:10000/
That sit.