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.

I am sorry, first upload was bad.....
https://mega.co.nz/#!uZAGFI6S!xVhHZdNvGij2L6gJk_VXnaTewgr7gFjOjnOCTtO_HHU


Thanks to all from litecointalk, who made this possible.

Let me know if that works for you.