Kernel Update Question

OS: 9.0 After last week's security bulletin, I downloaded kernel k_deflt-2.4.21-215 OK but failed to download kernel-source after two tries. (I have a very slow and unrelaiable dial up connection.) Question: Can I go ahead and install k_deflt withour the kernel-source? (There were several other much smaller downloads which did not install: mc, ethereal, etc. I assume I shoul manually install them as well.?) Thank you, Lucky Leavell