Okay, I’ve made multiple changes to the AdvMap4.pcx file attached in the o.p., as well as the Settings.txt file, so now 1280x1024 can be used with no interface glitches. The latest version can be found as part of the new resolution pack in THIS TOPIC.
I went for a different approach regarding the redundant space made available, by creating a new box below the info box, awaiting creative ideas of what we can use it for. 
Otherwise we can just remove it and just extend the Hero/Button/Town lists to all the available space (even though that may come of use only for the TownList). Let me know what you think.
