Hello, total newbie here, so forgive my ignorance. I am trying to set up a Raspberry Pi2 to use as a display in our School district. If I can get it to work, we will deploy about 20 signs. I using instructions from a document I found "Set up Instructions for Raspberry Pi2" and it says You can skip the process of manually configuring your Pi 2, per the instructions below, using a pre built image that can be downloaded from the links below: Linux and MAC: link Windows: link. I have tried to load that doewloaded file to multiple 8 GB and 16GB micro SD cards with no luck, even though the space on the card exceeds the size of the extracted file. Suggestions?