You need to download only the MAIN you have in your phone(S500_R8BE001_MAIN_GENERIC_LY_RED53). You'll use it to make rest file by dragging and dropping it onto "mkrest2.exe" from FAR\plugins\jdflasher\rest folder and also to generate the "quick access.vkp" and finally to generate the unlock patch(with Remove SIM-lock patch generator)