Sorry I can't help you, but maybe your post will help others when buying a digital camera. I use a 318 at work and have the same problem locating drivers. For this reason alone I will never purchase an HP camera, and I hope someone in their marketing or service department at HP reads this. To intentionally place a bottleneck between their product and service is a stupid move.
Tell you what. If you can't get the info you need in here, PM me with your email and I'll see if I can find the CD at work and get you the drivers.