The pictures for the homepage are selected under Layout. Pictures1-4 are used in the slider. Picture 5 is for the middle teaser (Content 2) and Picture 6 is for the right hand teaser Content 3.
The Brands which are shown at the bottom of the page are defined in the settings-Document "NORMA_Companies"
The size of the Picture in Content 2 should be 282px x 168px.