If you want a tutorial, search for it. You don't really need a tutorial because the code I told you to look at does everything that you need already. You just need to convert it for your purpose.
P.S. A "config" file is just a text file.
P.P.S. The file that you are describing wouldn't really be a cfg file, IMO. In the context of HLDS, a .cfg file contains commands/cvars and can be executed fully standalone with the exec command.
P.P.P.S Note that this was early in my plugin scripting experience so you would want to update this:
Code:
new g_sorry_phrases[SORRYS_MAX][SORRYS_LEN+1]
to
Code:
new g_sorry_phrases[10][65]
And then
SORRYS_LEN should be replaced by
charsmax(g_sorry_phrases[]) and
SORRYS_MAX should be replaced by
sizeof(g_sorry_phrases).
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