Nexus One - how to upgrade to CyanogenMod-6.1 V6.1.0-RC1 (10/27/2010) - instructions

I have just installed the CyanogenMod-6.1 first release candidate V6.1.0-N1-RC1 - 10/27/2010 (CyanogenMod-6.1 for Nexus One: Holy crap, it's full of AWESOME! V6.1.0-RC1 (10/27/2010)). Just keep in mind it is the 1st Release Candidate and as such, there are still some issues.

As the required radio image is still radio-4.06.00.12_7.img (Radio Firmware: 4.0.6.00.12_7 (FROYO RADIO, 4.06 OR HIGHER REQUIRED!)), I just have to upgrade to the new CyanogenMod-6.1 6.1.0-RC1.

I slightly depart from Cyanogen's instructions to upgrade :

1. Do a Nandroid Backup !
   --->> steps 1) to 11) from Nexus One - how to upgrade to CyanogenMod-5 [stable 5.0.6 version of 04/15/2010] - detailled instructions
2. Wipe : I add this step as it prevents problems with Google Apps ; just remember to save everything before (don't forget to backup your Track Site's data).
   The wipe has to be done while in recovery mode just after the Nandroid backup (the previous step).
   Here are the detailled steps :
   
   • from the "Android system recovery" screen you are just after the step 11), scroll down to the "Wipe" item using the trackball, press on the trackball to select the item
   • On the "Choose wipe item" screen, choose the "Wipe cache" item (the 2nd one) using the trackball. The "Wipe cache" seems to be enough and does not need to reinstall all applications. Press the trackball a 2nd time to confirm on the question that appears on the back of the screen.
   • The wipe starts and takes a few seconds to complete. At the end of the wipe, the cyan screen is restored. Press Volume down button to return to the previous screen "Android system recovery".
   • follow on with step 14) of the upgrade procedure
3. Install the CyanogenMod-6.1 6.1.0-N1-RC1 - 10/27/2010 ROM (your Google apps will be backed up automatically)
   --->> steps 14) to 16) from Nexus One - how to upgrade to CyanogenMod-5 [stable 5.0.6 version of 04/15/2010] - detailled instructions. Don't reboot at this time and continue with the step below
4. There's a 4th step to Cyanogen's instructions to install the most up to date version of Google apps : HDPI-20101025 (UPDATE 11/03 : Google Apps have been made available in a dedicated place : http://goo-inside.me/google-apps/ ; a wiki dedicated to Google Apps have been made available )
   --->> steps 15) and 18) from Nexus One - how to upgrade to CyanogenMod-5 [stable 5.0.6 version of 04/15/2010] - detailled instructions. At the end, just reboot (or power-down by selecting the right option with the trackball in step 17)).
   

The detailed instructions to follow are pretty much the same as for Nexus One - how to upgrade to CyanogenMod-6 V6.0.0-RC1 (07/11/2010) - instructions to get the 6.1.0-N1-RC1 - 10/27/2010 ROM update-cm-6.1.0-RC1-N1-signed.zip installed.