[movie78]

What ever i do, it boot straight to Kodi....

I am running a Standalone setup..

If you have standalone setup, it is necessary to restore the stock firmware before performing a factory reset to reload ChromeOS.
In order to do this, you will need to download/run the ChromeOS device Firmware Utility script and select the appropriate option from the menu. The script will give you the option to restore from either a backup file from USB (which you created before originally flashing the custom coreboot firmware) or from a generic copy extracted from Google's recovery image. Like the Kodi EZ Setup Script, this script must be run from a Linux terminal with a full bash shell; OpenELEC users will need to boot a Linux Live USB (Ubuntu 14.04.2 64-bit works fine) from which to run the script. Just download the ISO of and write it to USB using Win32DiskImager (from Windows) or dd (Linux/MacOS).

Boot the Linux live USB, then open a terminal/shell window
Download and run the ChromeOS device Firmware Utility script using the following two commands (hit enter after typing each command):
curl -L -O http://mrchromebox.tech/firmware-util.sh
sudo bash firmware-util.sh
Select option 3, Restore Stock Firmware
Choose whether to restore from a backup file on USB or not
If not, select your ChromeBox model so the appropriate firmware can be downloaded

After restoring the stock firmware, reboot, and proceed to Perform_a_Factory_Reset above to restore/reload ChromeOS.