I think in the Call Report instructions, in the Glossary for the ALLL there is something about this. Also probably in the Interagency Policy Statements for the ALLL.
Bottom line, I don't think you can "rebook" a charged off loan. And you wouldn't need to make a new loan to the borrower, he is in fact still owing on the charged off note, unless you negotiated a settlement with him. While technically able to make a new loan, you can't disburse the new loan funds to "recover" the funds on the charged off loan. So if the borrower begins to pay, I would book the payments as a recovery, and if a miracle occurs and they repay all of prinicpal, then I think you could book the remaining payments as interest.