Hi Chris
This is not possible with Media Manager as it only records once the call is connected to a user.
The only way to achieve it would be to have an "in-line" call recorder like Oak Telecoms Record X, but still there would be two separate entries, one recording the Voicemail and one recording the user.
The question is why do you require this? What is the customer request? Hearing your own AA every time you listen to a recording will be a bit tedious, take up extra disk space(Not a lot, but still) and I'm not sure what useful information you'll get other than the mummblings of the calls as they wait for someone to answer.