two audio cards?

[Jeffrey Ross <jeff@xxxxxxxxxx>]

Before I stick a second card in the machine I figured I'd ask what to 
watch out for.   I'm going to stick a second audio card in the machine, 
this card will only have its line input used, I will not be using its 
line output for anything.  How do I configure the system to use the 
built in card for output audio but this second card for input audio?

TIA, Jeff