I have a Toshiba Satellite M45 with a Marvell Yukon Fast Ethernet and am currently running SUSE 10.0. Upon first boot my Network Card functioned properly. After I rebooted the card stopped working. I have tried reinstallation and earlier verions of Linux without success. I have been trying to install the sk98lin driver but I am a newbie and it is not working. I need to make a symbolic link to the kernel header file/files. However, I do not know where the kernel header files are or what type of files they are. Somebody please help me!

This is more a Suse issue than Networking, you might want to ask there (under Distros).
Sounds like you don't have the kernel sources installed. Not a Suse user, but I think if you start Yast -> Software -> pick kerne-sources package for your kernel level.
Open a console and enter "uname -r" if unsure of the kernel version.

Recent kernels (since 2.6.11) have both sk98lin and skge as options in the kernel build process - no need for modules unless you have one of the latest chipsets. If you have the .config, you could build your own kernel, but like I said, I've never used Suse so I can't say.

Edit: Guess we should check the simple things first - I presume you've already tried to modprobe it ???.

Recent kernels (since 2.6.11) have both sk98lin and skge as options in the kernel build process - no need for modules unless you have one of the latest chipsets. If you have the .config, you could build your own kernel, but like I said, I've never used Suse so I can't say.

On my Toshiba laptop (Tecra M3) these modules can't handle my network card unless I patch them with a patch from Marvell website. It is know that the sk98lin kernel modules is broken for some Marvell network card, you might want to try the one provided by Marvell directly.