[Linny]

This seems complex, indeed! I would hate to speculate on anything at this point, especially since you have not been living with this child for two years.
One suggestion would be to seek counsel with an expert American adoption lawyer, who is well versed in international adoption law. You could check in with an attorney overseas, but this (I think) could only complicate matters more.

My thinking (and this is limited at best, okay?).....would be that you'd have to formally adopt her overseas, apply for a VISA to come into the US, and possibly have to re-adopt her once on US soil.
So, with that kind of thinking, I believe it would be in your best interest to find an attorney who is not only well versed with international adoption, but also an agency (state-side) that is familiar with P.I. adoption.

My best to you......

Sincerely,

Linny