Being able to copy the template files over if fine but in regards to custom fields I coded into 3 of the core files that wont be possible or will I need to add all the code modifications into my own functions.php?
Doing that isn’t easy because the code I added was within switches and if statements in the core files.
I mean that doesn’t seem very developer friendly am I going about adding my own custom fields the wrong way? should I be using some hooks?