1. If you only want to show it on the forum home, it might be better to use a more restrictive hook location (global_start is executed on each page). Probably using a hook like forumhome_complete will cause less overhead.
2. In most cases you can leave this at the defualt of 5. You only need to change this if you have multiple plugins at the same hook location, and it is critical that 1 runs before the other.
3. To avoid problems with the location (directory) of the file, change the following line from:
PHP Code:
include('vaispy.php');
to:
PHP Code:
include(DIR . '/vaispy.php');