I am trying to install this patch http://www.nma-fallout.com/forum/dload.php?action=file&file_id=1075 , which was recommended in this thread http://www.gog.com/en/forum/fallout_series/fallout_mods . It doesn't seem to work for me, though. I followed the installation instructions and when I load up the game, it still says version 1.2 at the bottom right part of the screen(main menu). Any ideas?

second this question

Have you tried the Semi-official 1.2.1 patch first? I would supply the link, but the forums won't let me for some stupid reason.

Version 1.3.5 doesn't change the label in the actual game screen, so it will still say 1.2, so that's normal.