You can find nenscript for OS/2 1.x-2.0 and MSDOS on ftp-os2.nmsu.edu in pub/uploads/nensc113.zip.
Microsoft Word for Windows can produce files with incorrect DSC comments. To fix this, from the Control Panel, select Printers, Options..., Advanced, and then check 'Conform to Adobe Document Structuring conventions'. This is not enough to produce a valid DSC document - you also need to remove the leading Ctrl-D as documented in PRINTERS.WRI.
There are rumors that Word Perfect and Microsoft Word don't produce ``clean'' PostScript that follows the DSC conventions (See Section 9, ``Encapsulated PostScript''). This means that a lot of PostScript utilities like Ghostview and psnup, etc., that require the DSC conventions, will not work on them.