[Asterisk-Users] A Way to Write DTMF Digits as text to CDR?

[PA]

I've gotten my CDR working the way I like, but I am looking to customize it a bit.  I have set up an IVR menu, which works great.  I would like to be able to capture the prompted DTMF digits pressed by callers, to my CDR database but I don't see any AGI or Asterisk commands that allow one to customize the CDR contents.  Am I thinking about this on the wrong track?  If someone calls sales for instance, and presses 44364 for their PO number when prompted, I just want to have a text record of the digits they pressed in my CDR so I can easily view it.  No trying to do database lookups or screen pops from it or anything fancy, I'm trying to eat an elephant one bite at a time.  Anyone have a solution for that?  

I hope I'm not being a pest by asking a question every other day, but the responses I've gotten have been very helpful.  I'm trying to learn as much as I can from the array of documentation, and I swear I'm only asking when I feel like I've exhausted what I could find.