Ya Ganji has it lol. When I started playing CS I downloaded Hammer Editor shortly after and spent about 5 hours a month learning how to use the program.
To take a map that already exists and add spawn points you need to convert the .bsp map file into a .vmf to be opened in Hammer. But doing this messes with all of the map's textures . In short you are look at 1-2 hours to add spawn points and another 1-2 days to test/fix the map to make sure everything is the same as the original before you converted from .bsp. So 1-2 days of solid editing, and if you don't know Hammer at all you are looking at 1-2 months... lol