Welcome to LQ CarnalPlumber. You're right, it's an easy task, and what you essentially need to do is edit the lilo.conf file (which will be in the /etc directory), save your changes, then rerun the lilo program in order for those changes to take effect. (The term 'lilo' can refer both to the lilo.conf file as well as the lilo program.)
Tell you what though, the simplest thing would be to paste the contents of your current lilo.conf file here in a post, then we can tell you exactly what changes to make on each line. The format of the lilo.conf file is easy once you get the hang of it, but initially it will probably look totally cryptic.
If you're not sure how to print the contents of a text file, you can just run the "more" command. Run this command to print out your lilo.conf file
Post up the results and I can tell you what changes to make on which lines.
Lastly, secesh - per the LQ Rules
, please don't post unless you have something constructive to say. Considering that the original poster explained that he just installed Linux for the first time *last night*, it's hard to see how your comment that lilo is "easy and very common" would help in arriving at a solution to the question. Thanks -- J.W.