OK, I temporarily abandoned the idea of using the override system and installed everthing according to the readme instructions.
When I go to the Catalog > Attributes Controller and click on the "AttributCombinationsTable" link (need to make a nice button for this), I get a 404 error which says "Not Found: /admin/stats_attr_model.php". BUT that file is definitely there in that location.

Second, in the root folder "getPricefromcomboID.php" the first line reads:

require_once("ajax/xajax.inc.php");

So it looks like there has to be an added file which is not provided with this module in order to run the AJAX function.

YES, I checked and I did set the server address correctly in the jscript_main.php file.

Any explanations??? I would really like to get this mod to work...

Maury