When I use it, an error popup:
Fatal error: Call to undefined function:tep_array_merge() in C:AppServ/www/oscomm_2/catalog/admin/products_multi.php, after I Google it, the function 'tep_array_merge()' should be 'merge_array()', so is the same thing on line 278.
I hope this will be fixed in the later versions cause the problem cames up several years ago in early versions

More...