I am trying to connect my Sony DSC S75 to my system - Dell 4100 WinME. The software installs ok, but when it gets to the Install New Hardware portion, a message comes up stating that there are files missing - USBNMap.sys, and USBstor.sys. I've contacted Dell, they say it's Sony's prob, Sony says contact Dell. So, where do I find these files? The installation works fine on my older computer, running Win98.