cache.db won't store code, it just stores stuff like models and sounds rather than having them downloaded directly into your add-ons folder as was the case before
this mod in looks like it might run on a really old, outdated version of VCE anyway which would probably be fairly troublesome to find. this seems like something that might be possible to accomplish with the current version of VCE alone (though i haven't worked with it in a while so i can't be sure). i also can't seem to find this on an RTB archive so it was probably an old RTB2 add-on lost to time