installing a prepackaged kernel

[Robert Kratky <kratky@rob.cz>]

hi,
i'm probably missing something. could you please direct me to a place in 
the documentation where it is explained how to update your kernel using 
the prepackaged images.
my situation is this:
i installed woody using the bf2.4 kernel (2.4.18) and now i need to 
install the ALSA packages which, however, requires me to have one of 
those kernel-image packages installed. even though i don't need a new 
kernel, i'd happily comply, if only it could be done so that i wouldn't 
have to configure my system all over again (e.g. the graphics driver 
from nvidia).

thanks,
robert