Thanks a lot RedX1 - appreciate the links.Hi
Check out post 13 and post 21 from this thread.
Follow the image upgrade path from the Installation Instrucrions on the HPE page.
Once you get to 3.6.8010 from HPE you can then go to the Lenovo 3.6.8012 image.
If you use the Web GUI you may (Will) need to remove the old "Webimage.tbz" file after each stage.
I hope this helps.
RedX1