AD records in BIND

[Joel]

I've got a followup question to this whole discussion. I wasn't
planning on addressing these issues now but since it's a current topic
I'll ask it now. Is there anyway to get a longer TTL for the entries
in the _msdcs zone? I get two of these per hour (one from each DC).

What would cause them to change? Now that they are on my bind host
should I just tell the DC not to register with DNS anymore?

Thanks,
  - Joel