reiserfs ??

Hi ng why cant i make sub filesystem a part of the kernel ?? i try with the linux-2.4.0.SuSE and the 2.4.2 dl from a web site, but non of them allow me to make reiserfs a part of the kernel, i cant choice the option under filesystem ???? ps: no need to tell I'm a newbi!! ;-) -- Best regards/Med venlig hilsen Dan Christensen. 1535/A4EA971B