newbie: installing new drivers

[David Brode]

1.  I just added an ethernet card to my system (3Com SC509TP) and I 
understand that I'm supposed to use the driver 3c509.  My question is *how* 
do I get the system to load that driver?  (If I were installing linux again 
I could use dbootstrap, but I have the feeling there's an easier way.)  The 
boot msg doesn't have any "eht0" mention or any other mention of the card.

2.  how would your answer change if I told you I had TWO ethernet cards I 
wanted to install?

tia