Heeeellllpppp!! Downgrade symbian belle to anna nokia 500. 10 pts for the best :)?

[ZizzoBollito]

i think all of us know that nokia 500 works better with symbian anna but when i bought it, i upgraded it to belle. Now i can see that symbian belle for nokia 500 is a big sh*t. So how can I downgradethis os to anna???? Can you explain me all the steps?? Thanks a lot.