Get a Windows 98 OEM bootdisk, they have alot of features.
If it asks you for a boot disk, that means that you have some problems. The computer cannot find a good boot partition to go on, hence asks for a valid boot record, like on a boot floppy. It seems that with all new computers with an old hard drive tends to not like a completely different system, cause that is a major change. It is most safe to do a re-install from scratch.
When you put into a boot disk, it will not erase anything unless you tell it to, with the FDISK command.