To install the MTG Game Definition, add the OCTGN Game Directory to your list of Game Feeds. Paste this URL into the ‘Add Feed’ window inside Games Manager: https://www.myget.org/f/octgngamedirectory
These are the image packages you need in order to view the actual card images in-game.
All sets prior to Return to Ravnica Block - This is a magnet link to a Torrent, which should automatically load your default Torrent client when you click it. Currently, torrenting is the only method to obtain these older images due to its large size (~4 GB). THE IMAGES ARE ORGANIZED BY BLOCKS!
Additional image packs not in the torrent (direct downloads):
Tokens v2 (updated September 6, 2013)
Journey Into Nyx v1.0 (August 1 2014)
M15 (Low-Res) v0.9 (July 8 2014)
Conspiracy (Low-Res) v0.9 (June 6 2014)
Duel Decks: Jace vs. Vraska (Low-Res) v0.9 (June 6 2014)
Modern Event Deck 2014 (Low-Res) v0.9 (June 6 2014)
From the Vaults: Twenty v1.0 (June 6 2014)
Commander 2013 v1
Born of the Gods v1
Duel Decks: Heroes vs Monsters v2
Modern Masters v1
Duel Decks: Sorin vs Tibalt v1
Dragon’s Maze v1
Return to Ravnica v1
Special thanks goes out to the folks at http://www.slightlymagic.net for their amazing high-resolution card scans!