I have all G3 controllers, they handle both the LOR protocol and DMX, so I didn't change anything other than the setup tab line. I didn't use any of the LOR hardware-based effects like shimmer, if you have those in your sequences they won't work in DMX mode.
The imported sequences for my old megatrees aren't quite a crisp as they were when I ran them in the LOR software, but I think that's a very small price to pay for the ease, flexibility and features of XL/NC.