Glad that you got your problem sorted out Mallie. Yes, unfortunately, to keep a website secure it loses a lot of its interactivity, interactivity that is used in a lot of CMSes and related scripts. Hopefully this will be able to be resolved in the future with the advent of new technology.
Just remember that with disabling mod_sec it does make your site less secure but as long as you rememeber to make regular local backups (which is supplemental to any backups eUKhost may be making) then you should face very few problems that can't be resolved.
