So I took the tip from here: http://pastebin.com/m8fCaxPb to change the TotalFinder Finder icon. After that, TotalFinder won't launch anymore and console says it's because "shell is corrupted"
I will reinstall TotalFinder, since it will fix the launching, but I still want to know how I'll be able to change the finder icon. I have done it before, but for the life of me can't remember how I did it. I just did a reinstall of Mavericks and it reset a lot of customised icons back to normal. I managed to change them all, even the Finder icon, but as soon as I launch TotalFinder I get the old Finder icon.
Any help is much appreciated!