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You, my friend, need to get the H3objed utility by Sergey Rozhenko, also known as GrayFace or SergRoj, from here: http://www.grayface.chat.ru/h3objed.rar. You'll have to figure out how to use it yourself; don't expect it to be easy or convenient. The path is thorny. And one last thing: some objects cannot be changed; it will cause bugs.
And yes, there are actually very few maps like this (we're not counting WoG, which has scripts and other features).
And yes, there are actually very few maps like this (we're not counting WoG, which has scripts and other features).
Инфа о разных моих проектах, по большей части геройских, тут http://phomm.narod.ru