To what extent is an intelligent item a creature?

[qwertyu63]

As the rules say:

Intelligent items can actually be considered creatures because they have Intelligence, Wisdom, and Charisma scores. Treat them as constructs.

But how far does that go?

* Can you give them class levels?
** If you do, do they get hit dice?
** Skill ranks?
* Can they have creature templates applied (assuming it isn't inherited)?

Do the rules say anything about any of this?

[Phelix-Mu]

This note seems to have been intended to govern interactions between intelligent items, spells, and effects. Thus, as it is treated as a creature, it can't be left unattended, and is otherwise considered to be possessed of the traits of constructs for considering immunities and so forth.

I would point out that, while I am unfamiliar with the larger issue, the specific quote given suggests that intelligent items aren't creatures/constructs. Just that they be treated/considered as such. There is an important difference, it's just that the rules don't really make clear the extent of that difference.

[bekeleven]

Put simply, you've hit a rules black hole. If you want my house-rule:

Treat them as constructs with effective HD = Item's CL.

No class levels. Advancement: By GP.