The first step would be finding the
exact version of the 2.4... kernel you're using. To do so, type
uname -r at a console. You'll get a number like
2.4.22-10 or something like that (actually I'm using mandrake 9.2).
With this number you can search in your installation cd's for a file that has a name that reads like:
kernel-2.4.xxx-src and that would be your kernel source for the version you're using.
Post back the version of the kernel you have and wait a bit so a SuSe guru can be of more help

because I don't know Yast.