Giz, The install guide covers the file/folder permissions and exceptions. perfectly. But it has no mention of the install folder.
I noticed that, but will now change the files to 644 to see if that makes a difference, as I forgot to do that.
Like I said, it literally only affects cpanel, and is a setting within whm to allow this behavior like every other system. BUT the install directory itself needs no special permissions in any case.