Hey eyeiieye-
AWESOME advice! Worked PERFECTLY. A+++ to you my friend.

So to sum up, charge the key for about 1 hour, though I left mine in overnight. And then run the initialization procedure as follows:

1. Enter the vehicle and close the doors
2. Briefly turn the ignition on and off (5 times within 5 seconds). Don't actually turn on the car.
3. Remove the key; press and hold unlock. While holding unlock rapidly press lock button 3 times within a period of 10 seconds.
4. Release unlock button.
5. The central locking system activates and releases all locks in rapid succession to indicate that the initialization has been successful.
6. To initialize additional remote control keys (make sure that no more then 30 second elapse between each initialization procedure) repeat steps 3 and 4 ONLY. Do not repeat step 2. Note that you MUST initialize all the keys (at least that is what I found, otherwise by initializing one you de-initialize the others).