I'm working on memory, but you should just be able to run .pkg and then reboot/hold the programmer's button as per instructions.
I'm out of town now, but I really need to image my Sonnet disk which does have the OS 9 software on it(I'm not sure if the download will give you the OS 9 software). Mine is deteriorating, which gives me more motivation to do it(I'll probably image it as a .smi under OS 9 and upload it to the Garden). If the link doesn't work for you, let me know and I'll get on this.