i have a dedicated red hat linux server which i manage solely from webmin control panel.

now i have a small network of sites and plan to offer free hosting for a select few sites of the same genre. But i want to limit the bandwidth for each virtual site on full domains and/or subdomain hosting.

i was told mod_bandwidth module for apache is what i need

but i have no idea of installing it or even using it ? can this module be used through the webmin control panel ?

how does installing this module effect existing web sites on my server ?