Guys,
It is the same tool that we are using. SP flashtool.
Here is the link for the s/w ( a previous version of wat we downloaded.)
SP_Flash_Tool_exe_v2.1121.01.rar
Please follow this method to flash.
Install the drivers given in the forum. (The MT65x3 folder - Install driver file). Then restart the system.
Run SP flash tool. Choose the scatter file (MT6573_Android_scatter.txt) and Downloading agent (MTK_AllInOne_DA.bin).
Untick PRELOADER.
Then run Download. ( if file not found error comes, choose each file individally DSP_BL, UBOOT etc..)
When the s/w scans for the phone, plug in the phone(switched off).
Flashing complete.
Revert in case of doubts.