I am trying to do this as well.
It really depends on how far you want to go with it. I am doing some batch scripts (they automate things for you) so I can put in to the Unattend cd so that when the computer is shut down it does scandisk and defrag etc...
Back on topic... On your Win98 cd you have some tools that do not get installed with 98.
The one you need to do this is D:\tools\reskit\batch\batch.exe
Or to install Batch 98 (same thing) so that you don't need to get your cd out every time you want to use it.
D:\tools\reskit\batch\setup.exe
Any way you are best off going to
http://www.msfn.org/board/lofiversion/index.php/t35589.htmland most of your questons will be answered there.
One suggestion though, Dont try to get it all done in the first go, Just do one bit at a time, so that if there is a problem, you know where to go to solve the problem.