If you don’t have Anki yet, you can download it here. Also consider downloading the iOS or Droid app to make use of waiting times throughout the day (they add up!).
You can download the Core 6000 deck here. Double clicking the deck will add it in Anki.
Click “Browse” in Anki and then “Core 2000 and 6000…” in the left panel.
Click “Cards…” near the center of the window.
Then click the plus (“+”) in the upper right corner to add another card type. And click “more” at the bottom and choose “Rename”. Name it something like “Core Vocabulary Kana”.
Select everything in the Front template window and delete it.
Also delete everything int he Back Template window below <hr id=answer>.
Click “Add field” near the bottom and choose “VocabKana” and click “Ok”
Click “Add field” again and choose “VocabEnglish” and click “back” and “Ok”
Then you can close the card types window and the browser window and you’re ready to study vocab with Anki.