No, you don't have your kernel installed yet. You only untarred the source and created a symlink to its directory. That's the beginning of it, though. Look at those links who were provided to me by someone willing to help: Link1
. They helped me a lot.
Yet, you might want to use the 2.6.10 kernel, the latest production version. The 2.4 is quite old . You can get the latest sources from www.kernel.org.
EDIT: you told us you untarred the source, but where?