We are getting close to nnBackup 3.01 release. Right now we are updating the docs and fixing the installation procedure.
Please, test the latest nnBackup beta ( http://www.nncron.ru/forums/viewforum.php?f=3 ) - this is a good idea the program to be tested thoroughly before it is released.
You can take a look at the updated docs as well: http://www.nncron.ru/nnbackup/help/help.htm . Please, report any glitches you have found!