No need to make experiment....Read carefully my guide and not to do how you want... use this other program EASY if not are good with CIGWIN:
http://forum.gsmhosting.com/vbb/f777...bbasi-1943171/
Need All BOOT file for one Good Sdc File, not only one Boot.img file...
Anyway if not are good to create one easy Sdc File and Sd Card try with solder EMMC DIRECT wires and Write Stock Fw .tar.md5.
And NOT use Low version FW then had phone first of BRICK...have wrote above, FOR SURE use Last High Fw for you Phone.
BR