Yes sir (or ma'am). Cache maps 3 4 and 5 should be the MP ones (they are like 48 MB or something, smaller than 1 & 2) and you have to open them in HMT, HHT something to see which they are, rename them accordingly, and have all 23 maps (24 with UI?) when extracting tags.

Edit: as of note (THIS IS MY UNDERSTANDING), you pull all those Xbox tags from the maps. That way, when you import a custom map, if theres a tag with the same name, it's already there. What does that mean? I believe you could import a map without any tags and it will try to convert ALL those tags which will be very prone to error. It doesn't want to reinvent the wheel, hence the database idea.