The codes themselves are simply strings of characters in a text file, it is much safer just to copy and paste into a text document and save in the templates folder than to download the .txt files. Many sites now show the strings of characters for the build (or will do soon).
You 'could' just start editting the wiki to include these for builds...
or you could do it the old fashioned way just once then save it yourself. This second choice is most likely faster than searching for a build, finding, downloading, pasting and loading template...
Unless what you really need is build help... thats a whole other ball game.