Editing maps names within a campaign

[Sieben]

Greetings Hive,

In my custom campaign, I stupidly named the missions with their numbers:

Spoiler

And now, I wish to add new missions between existing missions, which will bring confusion into the missions numbering.

Is there a way to edit maps' names? So I can choose names with more common sense!
(to be clear, I'm not trying to edit maps' names from Scenario/Map description, but to change the maps' files names within the campaign)

I'm assuming it might be possible to edit missions files contained within the .w3n campaign file with a MPQ editor, but I'm not sure it would work and I'm not comfortable fiddling with stuff I'm not familiar with (I wouldn't like my maps to get corrupted or bugged). Would that solution work? Or is there any other way?

Thanks a lot!