Your wot directory should be here: C:\Games\World_of_Tanks\res_mods, res_mods is where you want to put remodels and skins and the like, though with the last update they also added a folder simply named, mods, some newer mods are being compiled in a new format. Milky hasn't gone with that yet though. So take his remodel, whichever one you have, unzip to a folder in my documents or whatever, the folder that comes out of the zip will likely be name 'remodel name ver. 1.0 whatever' go into that folder and copy paste the res_mods folder to you wot folder, when it asks if you want to overwrite the res_mods folder click yes. If you have downloaded other skins or remodels for the tank you're installing, it's best to go into your directory and delte the one for said tank if one is in there, then drop in the new one. This prevents conflicts and other unwanted instability.
Example, if you have Milky's Ram II remodel, an older version would be here: C:\Games\World_of_Tanks\res_mods\0.9.17.1\vehicles\american\A62_Ram-II so you would take that out, the A62_Ram-II folder, and then go check here: C:\Games\World_of_Tanks\res_mods\0.9.17.1\scripts\item_defs\vehicles\usa remove the .xml script file named a62_ram-ii. Now install new updated version of the Ram.
His newest releases end up here: C:\Games\World_of_Tanks\res_mods\0.9.17.1\vehicles\milkym4n\A06_M4A3E8_Sherman he has his own folder structure now, so instead of his remodels being in Chinese or American folder, they're in his named folder. I know Avalon304 here on NA and TheFalkonett on EU have also now done this as well.
Hope this helps you and others out, happy hunting! <O