[Q] Xperia E1 Firware topic

Can anyone point me in the direction on how to downgrade my Sony Xperia E1 D2005 to Ice Cream Sandwitch? I have this version of Android in my Xperia J and it works 100% better for my GPS what i use a lot. I cannot get flashtool to work on any phone but i did manage to flash my E1 back to jellybean from Kitkat to allow me to root it but the firware was an IMG file so i could use Phoenixsuite. Any way of flashing from SD.

Cheers