How to add custom houses to VRP server


wondering if anyone could help me out with something please, i have my own server running for myself right now, it is a VRP server, i was wondering if you could show me how to install some custom houses please? because i download the files from gta5 mods then the only thing in the file is a .xml file and i do not know what to do with that, so your help would be much appreciated thanks!
i have been searching on YouTube and there is NO videos showing how you add the houses to the server