Can anyone please tell me why libraries and homegroup are useful in W7? I understand it is "easier" to setup, but is there anything else? I already have my files organized in folders (Audio, Documents, Programs, Pictures, Videos). Is there any difference if i set that folder as a library? Is Homegroup any different than normal file sharing (when everything is setup). The only difference i noticed is that there are no write permissions (at all, except public folder, but that is not even the same folder) when using homegroup.