Where in your page you need to include a picture, insert some code like this:
<img src="/hfssys/logo.png" width="140px" height="140px" align="left" alt="Bild fehlt"[/color] >
The red path-filename must be your file, starting from root "/" in your vfs (virtual file system). In the example the folder hfssys contains pictures to load, it can't be protected to have available the pictures before login, but it can be hidden.
The blue text is optional to define size, alignment and even an alternative text if the picture can't be loaded.
I suggest you bind your pics folder to root of vfs, so your filename can be: /pics/mypic.gif for example.