This is a question that should have an easy answer. So far the answers I have found involve recompiling the kernel.

I want to install a derivative of Slackware 4 on an old Toshiba laptop with 24MB ram. It seems to work great. Except that it is trying to load the pcnet_cs module instead of the axnet_cs module for my pcmcia ethernet card.
insmod tells me there is no axnet module. A quick look at /lib/modules tells me the same. If I get the right .gz then I should just be able to pkg it to install the axnet_cs module.

I've been searching but so far I've only discovered it should be in with the kernel modules.

How can I get this one module installed?

There is no other option beyond compiling the kernel. You cannot use a module compiled for one kernel on a different kernel. Unless there is a package that contains that module which can be optionally installed in your distribution (and I am guessing there is not) you must compile it yourself.

Is there a package for Slackware 4 that has the axnet_cs module?