Just a suggestion, but maybe make a sticky out of this topic.

I have simply taken the boxes from a modified OSCommerce/includes/boxes folder, placed them into the same folder within an OSCMAX and it works perfectly (copy the header graphics accross etc)

Maybe an idea to have a single topic that users who have managed to implement an OSC into OSCMAX listed, make it easy for us to find the ones that work and how well etc

I have attached my categories box which simply used the OSC add image to header of box contrib.

see it here - www.shallways.com