1. Download kernel-update.zip and system.img here
2. create folder "cm6" (for example) in /sdcard/clockworkmod/backup/ and put system.img in there
3. go in adb shell "adb shell" "cd /sdcard/clockworkmod/backup/cm6/" "md5sum system.img > nandroid.md5"
4. go into CWM and make sure you're on NoRFS advanced (a=e4)
5. wipe
6. flash kernel-update.zip
7. restoring cm6 system.img in cwm
8. flashing gapps.zip (get it from CM-forum)
9. reboot and enjoy