I use the WordPresss plugin Under Construction Page a lot. And I mean A LOT! It’s basically one of the plugins I istall first, whenever i start a new WordPress project.

One thing that seems to bother many people is that “it is not possible to center pictures that are not 100% width” – well – guess what: it actually is possible. And it only takes 2-3-4 lines of CSS, depending on how you count:

.ucp-module {
    margin: 0 auto !important;
    float:none;
}

You simply add these lines of CSS to the field “Custom CSS” under “Page Properties” aaand Bam! Magic! Or actually ‘just’ the magic of CSS. Hope this helps? Cheers!