Yes it's in bold, so yeah it's for the 0x0 -> 0x57 name extension.
I just wanted to make sure that I should change the "#0x58 to the NEW lowest index, ex "#0x0" if I wanted that to be the lowest index, or if I should change the entire thing to something else.
From my understanding of Fancy Knowledge #4 - Assigning A Map To A Certain Worldmap the only way to add more maps to Worldmap 0 is to add index below 0x58, unless you re-write the actual worldmap map selector routine.
Anyway I'm thinking about posting a very specific guide on doing all of this once I have it working on my end, since I had to read your post quite a few times to actually understand how to do this, hope you are okay with that, if not just tell me and I won't post it.
Thanks for the help :-)