Can you add non class spells to a character in HLO

[UKDrew]

Like the title says. Our GM gave us some spells outside of our regular class spell list. Is there a way to add custom spells in HLO.

These spells I'm trying to add exist in the Pathfinder universe. For example, adding 'air bubble' (a non-paladin spell) to a paladin doesn't seem possible.

Is there a workaround to this or is this a limitation of hero lab online?

Thanks in advance.