how to upgrade to 4.0 with massive customizations
I'd like to upgrade just to get the auto thumbnail feature. However I have made massive customizations to 3.0
So my question is, is there a guide somewhere as to which specific files are changed by 4.0 in regard to thumbnail feature? I would assume functions, home and archive, but before I dig in I was hoping someone might have some insight... Brian? Can I safely just partially upgrade the home page and functions for the sake of thumbs? Thoughts?
I do not really want to hunt and peck code all day if possible...