Follow these steps:
Create a folder in your Mod folder called inteenmods (exactly as I have written it here)
Make sure your resource.cfg file is set out like this:
DirectoryFiles inteenmods autoupdate
That last line is important.
Then all you need do is put the mod inside the folder you created in your Mod folder.
Download my resource.cfg file here: https://www.mediafire.com/?010yzw9j38z8sq9