How to make Cracked Orange Prism Ioun Stone like Page of Spell Knowledge

[pholtus]

I'd like to make the cracked orange prism Ioun stone behave similarly to the Page of Spell Knowledge. As it currently stands, the Ioun stone displays a selection that then displays on the item, but nothing seems to change on my spontaneous caster's "spells known" list. The Page of Spell Knowledge works as I expected.

When I tried to see how Page of Spell Knowledge worked in the editor, I found a helper, but I can't figure out how the helper calls the list of spells, much less how to restrict those spells to just level 0 spells.

Any hints would be much appreciated!

Thanks