How can I generate a PS or EPS file from any application that can print output?
You need to have a suitable PS printer driver installed (although there is no need for a physical PS printer); if you do not already have one installed then see below. Then, in the application from which you want to produce the output, select Print or Print Setup from the File menu and then in the Print dialogue box select a PostScript printer and if necessary check the option to Print to File.