maybe i am missing something, but if you have a page named products.php, then add prodmain.php to it as a plugin, adding products.php as a plugin to prodmain.php will just cause the plugin system to loop around endlessly.
Yes it would.
I want to call a plugin FOR products FROM prodmain. In other words, I want to REPLACE prodmain IN products with a plugin called FROM prodmain.
Hope that's clearer. . . :-)