pagelines_welcome_plugins will filter the display of the plugins listed on the main welcome page found under PageLines > Settings.
Say you want to remove the list (only) of the default plugins PageLines has added advanced support for. Just add this to your 'functions.php' template file in your (Child-)Theme:
Now, instead of simply blanking out the default plugins you want to replace them with a list of plugins you have enhanced your theme for. Use this code for a starting point:
array( 'name' => __( 'My Plugin' ), 'url' => 'http://wordpress.org/extend/plugins/my-plugin/', 'desc' => __( 'My Plugin is really cool to use with my theme' ) ) ); return $plugins; } ?>
NB: my_plugin is just a placeholder name, use the appropriate name and references for the actual plugins.