1. Backup with Titanium Backup of the Systemi would advice you to make a backup all of you content and format internal and external sd
2. Format internal SD (factory reset)
3. Format external SD (this is where my backups are stored, hence I need to move the data to my pc before)
4. Flash Rom r6 + KK 2.8 + Gapps
5. Reboot
6. Repopulate external SD card from pc
7. Restore of all apps with Titanium Backup
8. Reboot
Is this what you are talking about?
What would make the difference to the actual process?