Hey Chris,
Im the guy who made the other thread you posted in by the way

From what I understand.. if you apply from inside canada, it should be fairly easy to have her stay with you (apparently won't even have to renew her visitor status if she's american and you're doing an inland application.. at least that's what I read on these forums, but double check this before deciding to not apply for visitor extension if you take this route)
The only thing is that:
1) she cant travel outside canada until she has her PR (or at least would risk to see her PR application denied if she did)
2) no right of appeal in inland applications
3) the process is a lot longer
Now if you apply from outside canada, from what I understand, it should still be pretty easy to get her a visitor extension if you provide proof that your application is in progress and that you can provide for the both of you (since, I assume, she wouldn't have a work permit for the duration of the process)
So in both cases I think it's possible for her to stay with you while the application process is going on..
that's MY understanding of everything anyway, I'm not 100% sure of all what I said but hopefully it'll help, and hopefully someone who knows more about this will read my post and correct me if Im wrong! or approve if Im right

Cheers
