Here's why. Each machine appears to need some collection of drivers and maybe a procedure. With some million different machines no one can guess all the exact steps so you find web sites with guides rather than a step by step.

For you the answer is the usual.

Boot up the CD or the supplied boot diskette.
Run the setup.exe on the CD
Windows 98se is now installed.

Finish by installing drivers for the machine.

It is that simple.
Bob