Hey wish. I don't find time to join kype. I got it installed with the tips Arngrim posted.
It's very easy.... install it.... ff the error pops up you copy the whole folder and just replace it after the rollback. I installed 8.3 sperately because even with the manual install of the exe the install error accurded again. But the elephant was installed completly into the folder so just opening the Elephant.exe worked fine for me even with a broken install.