I was ready to shoot myself in the face with an ICBM just a minute ago. I couldn't, for the life of me, find out how to install the (mac reqd) software that let you get onto your HP MSS. I was not trying to use my Mac as the "main pc". Just wanted to log into MSS. After about 3 hours of headbanging, I found this article:

http://h10025.www1.hp.com/ewfrf/wc/soft ... ct=3548165

I still needed my PC (no problem) and it worked like a charm. My Itunes is connecting to my MSS and pulling the information into my library. I'm not sure if I'm doing it right, just happy that I can get onto my paperweight (haven't used it in over a year) and enjoy the money I've spent. Next is connecting my PS3 and Xbox360 to MSS!! Hope this helps!