Sir, Thank you for your kind reply. I will manually add individual file (i.e. Sicilian-Lowenthal.bin and Sicilian-Sveshnikov.bin into book.bin and so on...) from "Regular openings" (http://rebel13.nl/rebel13/pgn-annotator.html) by using "Merge books" option in Annotator 1.2 Basic (44 Mb). Is it the right way to do it? please let me know.