(adsbygoogle = window.adsbygoogle || []).push({}); You must have Call Of Duty 5 For P.C for this..
Note: if you have the mod tools then this is pointless too you.

So, To Start.. Open Up Your Call Of Duty 5 - World At War folder
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Go Click The 'Main' Folder, now you should see alot of .iwd files..
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Now, you need winrar which i assume you already have it.
i recommend making a back up folder to copy all the .iwd files incase you messed up yourself but to the next step..

Click on one of the .iwd files and you want to keep the name but change the .iwd to .rar
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now all you have to do is open them up
to go back on the game rename back to .iwd files

Awesome! I will have a look soon, I need a friendly fire dvar for when I'm host, I can't seem to find one and it's very annoying :\