first download the source code for you
is a good start
then uncompress it in a subfolder of
it a standard location beter stick to the tradition
enter inside the directory and type
this crates for you a .config file that shall be based on your running kernel then
navigate through the bazilliions of options enabling and disabling the function you want
then if it is a 2.4 kernel type
if 2.6 go directly to the next steps:
(and sip a good looong coffe)
(note the capital "I" has to be preserved when iusuing the command)
better have some reading before...
you can do some bad bad minstakes...