For more information on kernel modules and their utilities, refer to the following resources.
lsmod man page — description and explanation of its output.
insmod man page — description and list of command line options.
modprobe man page — description and list of command line options.
rmmod man page — description and list of command line options.
modinfo man page — description and list of command line options.
/usr/src/linux-2.4/Documentation/kmod.txt — description of kmod and why it replaced kerneld.
/usr/src/linux-2.4/Documentation/modules.txt — how to compile and use kernel modules.