Clean install error: An error occurred while extracting files from the package "AdditionalSpeechVoices.pkg"

Hi,

This is the chronology of what went wrong: (MacBook Pro, Retina, 15-Inch, 16GB Ram) :

1. OS X 10.10.5 Update installation failed; after finishing and prompting me to restart, the computer failed to start shutting-down when the Apple progress bar was about to reach the end.

2. Computer failed to start each time, turning off by itself mid-progress.

3. Tried starting it in Safe-mode... didn't work (various times, it kept turning off)

4. Started on terminal, ran -fsck; got an error message prompting me to backup and format the HDD (several times)

5. Started in recovery mode, ran Disk Utility Disk Repair, same error message (Made several attempts)

6. I backed up my data using my desktop in Target Mode

7. Ran Disk recovery and attempted to make a clean install... (I made several attempts, but it stalled after almost 2, 3 hours downloading additional files; left it overnight... didn't work).

8. I decided to make a clean Install, booting from an SD card. I formatted the card (Mac OS Extended Journaled), then I created a partition ('Untitled') with a GUID partition table. I downloaded a stand alone version of OS X 10.10.5, and via terminal I made it bootable entering:

sudo /Applications/Install\ OS\ X\ Yosemite.app/Contents/Resources/createinstallmedia --volume /Volumes/Untitled --applicationpath /Applications/Install\ OS\ X\ Yosemite.app --nointeraction

9. Plugged-in the card, restarted my MacBook Pro, the now bootable SD Card worked and I started installation... after several attempts, I am getting the following error message: An error occurred while extracting files from the package "AdditionalSpeechVoices.pkg"

I have no idea what is going on... Please help, any ideas?

Pablo