In the zip files are the modded files and the originals so they can be changed back and fourth easily, either manually copy the dats over one by one or drag the 'ROM' folder from the mod zip to the 'FINAL FANTASY XI' on your hard drive. When you click the download link, click the white arrow top right to download the file. Going to post links to the HD mods I'm making here, was going to post in the other thread but seems to of been abandoned with lots of dead links and images on it.