For the flashlight you wouldn't put it inside of a .cfg.
What you would do is go to C:\Program Files\Steam\steamapps\YOUR ACCOUNT NAME\day of defeat source\dod\materials
Then you would drag the .vtf file (flashlight001) into your 'effects' folder.
If you don't have an 'effects' folder, then make one with that exact name (without the quotation marks.
If you have any more questions, then just ask me. And do you want a free set, to look nicer???
Here is a LINK to a whole bunch of sets that are absolutely free =D