Unrar file and copy folder image to pendrive and install.
Voila
Now you can install any lower firmware.
https://mega.co.nz/#!acNQCDCJ!J6rDEIGdA ... 3cBHVKzcS8
https://mega.co.nz/#!vF8nBTaZ!i51ToTT0A ... ItK_8BoLjc
https://mega.co.nz/#!eItH0YCY!Ga8OB_ko7 ... hTKQjUqfEk
https://mega.co.nz/#!PclGDCwb!clfuHsYG5 ... NNnxekhCpA
https://mega.co.nz/#!7E1wRB4Z!kxH4MJVp5 ... K2FcX-gAXQ
https://mega.co.nz/#!XEUUALBC!QX8R5eu-2 ... igqR3qIC-g
https://mega.co.nz/#!jVUG3JwR!TDwxroPNc ... gaCjzN4-cE
https://mega.co.nz/#!CI93SJRK!KvBNGhHP5 ... 1Pr4-1Iv_s
https://mega.co.nz/#!WY9xHBIa!m6fsU7N_m ... LN4Qs09roQ
https://mega.co.nz/#!XB1zlTSR!7X9J2WeEZ ... 4_WrGkbulI
https://mega.co.nz/#!qVcnBayC!jX8-qfYEK ... DNx5OO8Ck8
https://mega.co.nz/#!XccBnbLa!ZcVVb0kOe ... QZZL7prfZY
https://mega.co.nz/#!jc0WFZrT!gquit_5AU ... Hnnb7jGNwQ
https://mega.co.nz/#!fRskFTrD!rOhqOCTwo ... d5PIE0RtEo