http://code.google.com/p/avesta74/downloads/detail?name=RME.rar&can=2&q=
Open map with this editor, save it, open map with the official mapeditor and it will rid you the red tiles. However prepare to have borders fucked.
To fix some of this:
- Check what ground id it was on the borders that got converted successfully.
- Take notes.
- Goto Remere's Map Editor/data/740/grounds.xml
- Go to the scope that handle grass
- Make sure the chance is zero on all ground tiles EXCEPT the id of grass that was converted successfully.
- Save grounds.xml
- Open map as 7.6
- Go to edit -> Randomize map
- And all grass tiles will be the "good" id that will convert successfully.
Same routine goes for rock floor and gravel.
To save time you can also replace certain borders with existing 7.4 borders (that is still available in 7.6)
I'm talking mainly about swamp borders.