Thora lamba process hai par bataata hu.First of all go to this site-
click hereUpar ke menu me trains ka option hai uspe click karo fir apni manpasand train pe click karo aur download karo.Download files contain .txd and .dff file.
Fir IMG tool usi website se download karo-
click hereUske baad ka instruction wahi pe diya hua hai use follow karo