Ok 2 things ,

One, where exactly are the .C files?

Two, If they are in the .DLL files how do I edit them?

you download the SDK ,,
the files are in there....
jka-universalSource\codemp\game.

I suggest you don't use the universal SDK unless you have Visual Studios v6.0.

Secondly, the .c sources files are in the second JKA SDK package, which you can find on all the major jka file servers. The .dll files are the compiled version of the .c files. You'll need a compiler that can do .dll files (like Visual Studios).

alright

So I got the sdk and found the .C files
But instead I have DevC++(I was rumaging thru the forum and someone recomended it), Are there any special tools in Visual Studio that arent in DevC++?

A lot of debugging tools i think, plus i think its easier to search for things in visual studio and searching is sooo important because its tons and tons of lines of code.