Thanks, Jegbagus. I managed to get it working with a bit of a compromise on both designs, but that is fine.
If I choose circle loader, can I change the loader background from white to black and the text color to red? In my post I was referring to the background color and not the logo.
Also, there is a problem with Internet Explorer – the theme works fine on Chrome and Firefox, but on IE the whole design breaks. Is there a way to make the theme work with Internet Explorer? If not, when the page is viewed on Internet Explorer, can I have a pop-up message or screen or message-bar appear, that warns the user not to view the website in Internet Explorer?