Read here: http://www.topsony.com/forum/far-manager-f31/flash-k800-cid53-k810-software-cid53-begginers-t11605-mensaje89845.html#post89845, but use these files:

1. S500_R8BE001_MAIN_GENERIC_LY_RED53 (Downloads > Firmware > S500 > R8BE001_RED53)
2. S500_R8BE001_FS_FRANCE_RED53 (Downloads > Firmware > S500 > R8BE001_RED53)
3. HB1-06_Gen_CDA102568_17_R8A_GENERIC_FRANCE (Downloads > Custom Files > s500custpack)

For unlock read here: Patching CID53 (DB2020)DB2010,2012