For once, those plugins are already added. Second, it's pretty much clear but I'll rephrase those for you.
So technically those plugins only works when you have OP privileges, gets? So when you don't have the OP privileges they don't work anymore.
What I am asking for is if there is a way for the plugin to work even without the OP PRIVILEGES.
To make it more clear for you OP privileges = Admin privileges
(You get OP privileges by being /op'ed to the server) I hope this is VERY much clear