Hi,
Categories do not have an image, then you can't use [CategoryImage]! The category description is already inserted as a title attribute in the anchor and displeyd as a tooltip by most browsers. Look at the code of the page, you should have something like that:
<li class="StoreMenuCategoryListItem StoreMenuCategoryListItemLevel_1"><a title="DotNetNuke Products" class="StoreMenuCategoryItem StoreMenuCategoryItemLevel_1" href="/dotnetnuke_2/default.aspx?tabid=59&categoryid=84&language=fr-fr">DotNetNuke</a></li>
The category message is inserted at the top of the Store Catalog module when you browse a category. The purpose of this field is to enable a nice presentation of the category by adding, for example, an image; or to allow navigation to sub categories with images and links.
There is no 'end' date for new products, the last 'n' inserted products are always displayed (where 'n' is equal to the number of rows multplied by the number of columns definied in the Store Catalog settings).
Popular products are the most ordered products, then they change over the times when new orders are placed to your store.
Gilles