PS displays module images in some contexts but not all. In my NET and NETnote modules, NET has an image in the heading of all 1:1, and NETnote has an image in all n:1. The modules are ThML. NET's content has this form (from Gen 1:1):
<div class="sechead"><center><img src="/images/netbible.jpg" /></center>The Creation of the World</div>
NETnote's has this form:
<center><img src="/images/msstrip.gif" /></center>
Perhaps it is significant that the image in NET is in pre-verse heading between <div></div>. cf. display as seen in e.g. Xiphos.