We recommend that you create a new folder in order to keep the customized files instead of leaving it all together with the original ones. On doing so, you will:
a) Have the possibility to get back to the original interface configuration, at anytime
b) Make sure that your files will be safe after a version upgrade.
You can also choose whether to place the files inside or outside the web structure. Read next, how each option will behave differently.
Inside the web :
When the directory that will keep the customized files is created inside the webroot directory:
Outside the web:
The customized files, can also be placed in any other disk location. In that case:
1) The files will be protected, because it won't be possible to access the customized files from a URL.
2) The paths to the files, indicated in the "WebAliases.ini" have to be absolute, as shown in the example below: