For the conversion ONLY, I make my xlights config exactly the same way as the conversion messages show.
Once converted, I switch my NC show directory back to where it was, thus loading the original setup.
The conversion process is just bringing in channels. Where you put those after the fact is up to you.
A normal 24 CCR LOR conversion for me consists of LOR networks 0 and 1, each with 1800 channels.
Once converted, they play fine on 9 universes on E131.