That variable is for adding what ever content that's generated by your code into IIP's cache table. I would recommend using box 4,5 or 6 and replace this:
echo "Admins: Your custom content and code can be added to this box by editing the custombox4pal.php script located in the pals directory.";
with this:
include "$thispath/addons/ubbtnews.php";
To add output to a box that uses cache you need to replace all of your code's echo statements with this: $TempStorage .=
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