Images of houses name format is:
houseid_floor.png
You can't just show one image for house on website, because houses often have few floors and you need to show all of them somehow.
In case of PHP, you can use
scandir function to list house images in folder and search for file with given house id in name.
All house images size are square. In case of multi-floor houses, all floor images have same size, so you can use some JavaScript gallery/carousel to show all floors of house and it will look fine.
Any error? Did you install
Download Microsoft Visual C++ 2015 Redistributable Update 3 from Official Microsoft Download Center (https://www.microsoft.com/en-us/download/details.aspx?id=53587) ? Are you running 32-bit system?
You can try to run newest version (v4):
What is new in version 4.0? website view with NPCs and monsters search configurable town names and positions - big names visible on map possibility to link NPCs and monsters ex. mymap.com/#npc,Xodet , mymap.com/#monster,Dragon+Lord scripts to run 'zoom levels' and 'compression' on 16 cores on...
otland.net
For v4 version, you need this Windows libraries: