Importing a map from a 528 into another 528 results in the maps screens all being written with all combo 0's
Here is exactly how I did this.
First I exported the graphics pack from my 528 Swansong quest.
This worked, but there were other things I wanted so...
I imported the subscreens top and bottom, that worked.
Then I tried the overworld map for map 1
It placed all the screens, and in the correct palettes, but every screen was "painted" with combo 0.
(all the items were still there) 😊
Since these were all just tests to see if it all worked, and doing this still never allowed my big link to be imported and working, I then imported the QSU, which seems to have worked too, but it rechecked the dmap flags that I wanted removed. 😉
Side note here to DarkDragon,
The checked dmap flags can be removed doing the method that you suggested, but how would I import my big link without importing it by means of the whole qsu?
Importing the whole qsu then checks those dmap flags again. 😉