I would suggest keeping it at a thumbnail sketch so speak. You can give the history before the bomb drop followed by what DB techniques you've tried, what's worked, what hasn't worked, etc. If you can keep it to 10-15 minutes maximum, it should give you some more time to work with.
I've never tried to record a conversation. It worked pretty well for me to write down questions, and then write the responses under them. I also took notes the whole time. I may have benefited from having a computer at my disposal so I could type my notes, but I did a lot sessions in the parking lot at work on my cell phone.
