Question : Add trusted site to GPO

I know this question has been asked one hundred or so times, but the instructions is what it throwing me off.

Please look at the instruction at the following link: http://www.experts-exchange.com/OS/Microsoft_Operating_Systems/Server/Windows_2003_Active_Directory/Q_22590528.html?sfQueryTermInfo=1+gpo+site+trust

In the instructions, it says to type in the full URL of the trusted site, then click Add, and then click Ok. The problem I am having is, that there is no Ok button, only a Close button. Any idea why this might be?

Answer : Add trusted site to GPO

I see what you mean. Apologies.

Have you tried this method?
User Config\Admin Templates\Windows Components\Internet Control Panel\Security Page\
Policy: Site to Zone Assignment List

Add in a couple of sites.