After you did fdisk, did you format the drive and transfer the system files to the HD?
i have a toshiba satellite pro 435 cds
it had win95 installed and running, but i tried to install win98 after using fdisk. now the computer says"invalid system disk" "replace the disk and press any key to continue"
i tried to boot it with a win95 startup disk but couldnt do it.
any recomendation will be appreciated.