According to Mr. Stanley Mailman (if you want to learn the whole communication, please search one of my previous posts), you can maintain your H-1b nonimmigrant status after using AP in this way:
after entering US with AP, you should
1) return to your H1 employer;
2)give HR a copy of your AP card;
3) give HR a copy of your new I-94
4) fill a new I-9 form and claim you will continue working on your valid H-1 petition
5) give HR a copy of the May 16 2000 memo (in case HR does not undertand the law)
After these actions, you are actually in your H-1b nonimmigrant status. You should file H-1 extension in the future if you want to keep your H1b status after the expiration of the H-1 petition you rely on after using AP.
welcome any comments on this summary!