I'd say the easiest way is to not install Win98 on its own drive, but to run it from either Win4Lin or vmware (which exists for both XP and Linux), or even try WineX/Cedega. Try it at any rate before going the real install way. Old games most likely won't need 3d acceleration from DirectX, so they should work fine under the emus. Besides, you can easily mess up with emus, it won't wipe your whole hard-drive.