http://www.bootdisk.com/
You can get the free start up disks from here. Being you dont have a floppy just run the 98 tool and put the files on a floppy and then copy the files to a cd. Make sure you set your system to show all hidden files and folders. If you can get the machine to boot to the cd then just change to the cd directory and run fdisk and delete everything. You may have a small issue with deleteing the 2k partition as it will or could be ntfs if memory serves me you just need to go into the section on fdisk where it tells you to delete all non partitions or something like that. Once thats done, format the drive and you should be able to load the machine. If not and you can still boot to the cd, then boot to it again, make a directory on the hard drive named install or what ever you want. remove the boot disk cd and replace it with the OS install cd, copy the entire thing over to the new directory. Go to that directory and go to your windows directory if its 98 you are installing I think the directory is called win98, but its been a long time for me with that os. Anyway just type startup and it should install.
If you have any more problems give me a call I make house calls for traffic, as long as you are in new jersey and have heat in your house lol.