[CentOS] kickstart question with 2 network cards

I am using kickstart to automate installs. working nicely.
I now have a box with 2 NIC cards and I am getting prompted for which 
nick to use.

I have a line like:
network --device eth0 --bootproto dhcp --hostname tmp.msgnet.com

in my kickstart.
This line does not seem to be enough to say install with eth0 even 
though there may be an eth1.

How do I tell kickstart to not prompt for which network and just use eth0.

Thanks,

Jerry