1. Create backup using ROM Manager.
2. Copied cm-9.0.0-RC1-galaxys2.zip to internal SD.
3. Verified MD5 checksum in ES File Explorer. (Checksum 7c91c25e2430f4432e63ac85c29d5a26)
4. Reboot into CWM Recovery.
5. Flash cm-9.0.0-RC1-galaxys2.zip
6. Wipe cache partition.
7. Advanced > Wipe Dalvik Cache
8. Reboot
MD5 checksum verified!
RC1
New CM Wallpaper!
Run #1
Run #2
Run #3