I have accedentally found a new way under SW. Maybe its harder but ill still show it.
First you must get on top of SW catherdal, there are a few posts here at mmowned that show how to do it. when you jump the gap move on a bit and look to your right.
There should be an opening in a building. now just jump through it and you will fall under SW!! I did it in version 2.0.5 (the newest)
sorry if it has posted here before but i shearched and found nothing.
Hope it works for you!!