You have an old Sound Blaster 16 PCI and you want to use it with Windows 7? There’s a simple way who consist on installing Windows XP drivers. A reboot and your sound card is recognize by the last Microsoft OS.
Just note the drivers are the same for Vibra 128, PCI 128, 4.1 Digital, et Ensoniq AudioPC. So there’s lot of chance that you can use those sound cards with Windows 7.