I finally find the solution by comparing the registry.In the registry
[HKEY_LOCAL_MACHINE\Drivers\BuiltIn\SC2440USBFN]
"Dll"="sc2440usbfn_new.dll" -> "Dll"="sc2440usbfn.dll"
Not sure why Eten replace sc2440usbfn.dll with a "new" one. But the new one is definitely not compatible w/ WM5Storage.
Please give me some points if you find this to be useful.
Now, I am trying to figure out how to get Skype Setting installed without M600's auto installation after hard reset.
