For backing up, restoring, and installing to a 2.0 Newton, you need the
Newton Backup Utility, which is free.  The Mac version is available now,
at http://www.info.apple.com/newton/aboutnewton/newton2.0/nbu.html, and on
America OnLine and CompuServe.
     The Windows version will be posted when it's ready, which should be
in the middle or end of this month. In the meantime, to install packages
on your 2.0 Newton, you can use Newton Package Installer for Windows 2.0. 
It is free and will allow you to download packages from Win 95 and 3.1. 
Apple will be posting it on their web site next week. 
     You can also back up a 1.x Newton to NBU.  This is intended primarily
for upgrading your Newton.