I just followed this guide: https://bitcointalk.org/index.php?topic=482352.msg5305449#msg5305449

step by step.  At step 6, I did the fix at the bottom of the same post.

At 900, I had 3 units that were throwing errors.  All miners are 0% errors at 850 though..

when you get your Pi, I'll walk you through it in PM. 

You can start by downloading the Scripta image in the post and W32DiskImager.
Use the diskimager program to write the scripta image to the SD card.

When I booted my Pi, I used an IP scanner to find what IP my DHCP server gave it and used my browser to connect.  http://www.advanced-ip-scanner.com