help: PXE and kickstart config file

Hello, 

I am installing RH9 to several machines from nfs server 
at the same time. If I specify ksdevice=eth0 or ksdevice=eth1 in pxeconfig file, only that network device will be used to find kickstart file. But I don't know beforehand which kind of network device every machine actually uses. That push me into hot water. 

Is there a method to force installation program to probe all of metwork device automatically, and then choose the network device depending on dhcp feedback info? I use NFS server to install RH9. 

Thanks! 

elechen 
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