The package at http://www.unna.org/view.php?/drivers/printer/PrintPack2 is a NOS 2.x-only package (and unusually small - is something missing?), so probably not. The documentation doesn't say anything about compatibility. Print Pack 1.0, as far as I know, is compatible with all Newtons; I've used it on NOS 1.x and an eMate.