This is what I do, it may simplify this for you. You really seem to be over examining what you need to do in order to be 2257 compliant.
First you need to make sure you have a 2257 compliant model release. I am not an attorney but I do know what it takes to be compliant so i would be happy to review your release.
second you need to have a digital or copied image of the models IDs (2 forms, 1 has to be photo and state or federal like a DL or passport), i use an ID form to photo copy the IDs onto and have the model sign it.
I then take a photo of the model holding both of there IDs next to there head on either side so yo see the IDs and the depiction of the model.
Once you have this paperwork you are nearly compliant. Now all you have to do is put the address of where you store the documents onto your Websites and DVDs. Here is my compliance page, every website has to have one in order to be compliant.
http://smokieflamexxx.com/2257.php
I hope this helps simplify this for you. I had 1 thing going for me before I started filming, I had already filled out over 300 model releases so I knew what was up hehe. Again I must stress I did spend ALOT of money as did alot of others on here to make sure our paperwork is fully legal, you dont have to use an attorney but i recommend it highly.
Smokieflamexxx.com