I just made an image, gridseed supported.
Just write image it to 4gb sdcard, stick it into your pi, fire up. Miners should start automatically after you've entered mining pool.
Hope this helps.

https://mega.co.nz/#!nYhRTByL!xCZrBJm1I5DmHsDdJd6czERlaoJImtoqN0ugj10HRqQ


Thanks to all from litecointalk, who made this possible.

Let me know if that works for you.