Root the Lucid (running GB 2.3.6) using spectrum_root_windows.zip (extract to new folder on your pc then, with your phone connect to the pc in debugging mode, run the .bat file).
Copy ClockWorkMod Recovery (touch) for Lucid vs840 (recovery-clockwork-touch-126.96.36.199-vs840.img) to your SD card. also copy the baseband and gapps (see below).
Using Rashr Flash tool from the play store, install the cwm recovery img from sdcard. Reboot into recovery when asked.
Once in CWM, do a factory reset (swipe to get past the -no-‘s ) then flash Image from sdcard. Select the CM10 (CyanogenMod) zip (cm-10-20130823-UNOFFICIAL-vs840.zip)
Now you can reboot the phone and let it start up normally. You’re all set.