Text that spans almost the entire screen width is less easy to read – I’d leave some whitespace on both edges. As for the login page (your link was wrong), you might want to draw the eye to the login form first. Western/Dutch people read a page from left to right and from top to bottom, in addition to animations demanding your attention in the first place. Thus, it takes a while to find the login form. Furthermore, the OLE box stands out from the rest of the page (different colour/shape, large letters), while you want the form to stand out, so perhaps you can move the form into that box and put it in the center. You can then move the “terug naar hoofdsite”-link below that and make it look less crammed. Also, be sure to check up on the d/t-rules in Dutch ;-)