Brian,
Skins are added only at the host level. The header images are generally built into the skin. At times they will be designated as the "Logo" from the settings that can be applied in the Admin>Site Settings control area.
Because we use many custom css styles to render and control the appearance of many of the 3rd party modules we use it requires the modification of every skin installed. If you have a specific theme in mind you would like to work with please let us know what it is and we'll help prepare it for use with your site.
Adding images in general can be done through the file manager under the Admin section or directly from within the editor using the "Image Manager".
An important note here is that your images MUST be sized web ready before they are uploaded into the site structure or you will present your users with some very large downloads. |