Yes that is possible. Probably the best way to do it would be to have a controller in the index.php file that way it loads the other files depending on the variable passed.
For example:
PHP Code:
if(!empty($_GET['cmd']))
{
//need to add error checking and cleaning here
$cmd=$_GET['cmd'];
}
$file = FILESYSTEM_PATH ."modules/modname/$cmd.php";
if (file_exists($file))
{
require_once($file);
}
else
{
require_once(FILESYSTEM_PATH .'modules/modname/index.php');
}
With this if the would request modules.php?mod=modname&cmd=test it would load a file test.php if it existed.