[newbie] Cable modem!

[David]

Hi,       I'm a pure newbie at this and would like to know if how could I get my cable modem to work.  I really need some step by step instructions.  And since I have a 20 gig hd.  It tells me that I have more then 1024 cylinders and I can't install LILO.  Is there a way to get 1024 cylinders so I can install LILO?  Thanks people!   Dave