Try searching for a simple guide to add them to your server m8 but if you want to add them to you client put the files in your wemade folder / legend of mir 2/ data. Thats if you want to play on a server with them. Adding them to your server is hard but all you need to do is follow either a guide (try searching) or a readme file / guide in the actuale downlaoded files. Please try and make what you want clearer in the future m8.
/Miles