Sorry, problem solved! (something stupid as me changing in /catalog/includes/configure.php value in line
define('HTTP_SERVER', 'http://xxxxxxx.com');
problem was not related to DEFINE MAINPAGE v1.3
Installed DEFINE MAINPAGE v1.3 osCommerce UPDATED FOR MS2 2.2
and index (main) page is without any graphics/css but with all data displayed!
Any idea what is wrong?
Try to change in adminProcesslogin.php in:
$SQL="SELECT * FROM Admin WHERE Login = '".strtolower($Login)."' and Password = '".$Password."'";
from Admin to admin (small a!)
(or in the admin.sql should be changed to Admin prior dump!)