I tried as per your post,
but i got the error, pls find attachmenthttps://drive.google.com/file/d/0B-G...ew?usp=sharing
Also if you edited build.prop, i think you need system.img to be flashed which is not present in above cwm backup.
So i doubt, even if you place preloader in your folder, flashing boot.img and recovery.img wont help.
Note: flashing wrong preloader will brick your device so always keep it unchecked in spflash.
Also i have attached images of folder containing files prepared by mtktool for spflash which i have flashed successfully twice when i stucked like you..
I think you should search for how to push build.prop using adb..