I answered your PM, but to respond to you here, the plugs are the same. If you have a halogen housing, I don't think you would have adaptives. So make sure the xenon housings you buy are the non-adaptive variety (although I think I've read the adaptive ones will work, I didn't want to risk it when I was paying for them).
Make sure the xenon you are buying has the ballast attached to the bottom. After that, just remove the old halogen housing, install the xenon one the exact same way, plug it in, change the settings using the gap tool, and go.
If you are buying a used xenon housing, you probably will not need to aim the headlights (but it would still be a good idea to check). If you are buying new, you will probably need to aim them.
Make sure the xenon you are buying has the ballast attached to the bottom. After that, just remove the old halogen housing, install the xenon one the exact same way, plug it in, change the settings using the gap tool, and go.
If you are buying a used xenon housing, you probably will not need to aim the headlights (but it would still be a good idea to check). If you are buying new, you will probably need to aim them.