Hero replacer.

It's better to use DXT5 where needed (except for some effects and unit/hero icons); otherwise, the textures will be too large, and the game will crash because of it. Heroes 5 doesn't like large files. In NVS, I try not to make textures larger than 1024x1024 pixels, and I also make sure that their file size is similar to the original. For example, if the original weighs 1.3 MB, your file should weigh approximately the same. Use DXT5 and enable texture generation. Then, your files will be close in size to the originals.