Not really sure by what you mean by "manufactures specs".
But when you installed 2K on it, it formatted the drive as NTFS.
Simply boot off of the 98 cd, when you get to the screen asking how you want to boot. Specify off of the cd. Then choose command prompt, does not need cd support. When you get to a command prompt run fdisk.
blow away the existing non-dos partition. Then make a new partition. Once you make a new partition reboot. Do the same thing again, except choose cd support. When you get a command prompt type
cd D:\win98
then format c: /s
Once it is formatted cd c:\
then mkdir win98
then cd win98
then copy d:\win98\*.*
After all of the files are copied
then type setup and the install process will begin.
I copy the files to make it easier when you have to reinstall files as you must do very often in win98. And when that happens, it will always go to the location that you installed the os from.
Why are you installing win98 anyways? 2K is much more stable and reliable then 98 or XP.