Debian and NICs

When installing Strom on a box here at work, the install prompts for the
NICs in the box. If these are changed later there seems to be error messages
during boot up about the changed NICs. This leads me to think that somewhere
the NIC and related driver is stored. This should be something I should be
able to change myself if I change the NIC.

Questions:

If this is true, where is this information stored?
And how do I change it?

Thank You,

David Demland
Qa/Process Manager
CADTEL Systems, Inc.
11201 N. Tatum Ste. 200
Phoenix, AZ 85028
(602) 648-6054
Fax: (602) 648-6054
ddemland@cadtel.com