first, make sure you have added the wa_evaluate.php file to your powerstore site.
this file is available in the Powergallery Download page in the Database Integration Update.
On the add to site page of PowerGallery, use the code in the Add to PowerStore section.
you will then need to edit the index page to use the wa_evaluate file.
find this code:
<?php echo WA_getCMSContent($database_PowerStoreConnection, $PowerStoreConnection,"Home Page", "Site Message"); ?>
and change it to:
<?php require_once("wa_evaluate.php"); echo wa_evaluate(WA_getCMSContent($database_PowerStoreConnection, $PowerStoreConnection,"Home Page", "Site Message")); ?>