Ok I've Got STSv4 & sort_order contributions installed on my OsComm.
Just a little error: when Categories are displayed at localhost/shop/catalog/index.php?cPath=0 level the top-right image goes blank.
Actually the image location is set like this: localhost/shop/catalog/includes/sts_templates/full/images/ meaning that it tries to load an image in the sts templates images folder but does not specify witch image...
In the other hand when i load a Category from my Catalog Menu the corresponding images appears as well.
Any idea of what's causing this?