second ethernet

[Jeffrey Ross]

I'm looking to add a second Ethernet interface to my FC3 system.  The 
interface is going to be used strictly as a capture interface for 
ethereal and as such has no need for an IP address..

The questions are:

1) How do I force the existing Ethernet interface (built onto the 
motherboard), which shows up as a via-rhine to remain as eth0 and the 
new interface which will be an Intel card as eth1
2) enable the card without any addressing (IP or otherwise) so the card 
remains silent?
3) will this process work for adding multiple additional interfaces, and 
is there a limit to network interfaces besides physical space for cards?

TIA
Jeff