Custom System not adding Overrides?

Ok, go into the plugins area and tell me what version of hyperspin core you have installed. I think you might have an older version or something.

2.0.34 - Hyperspin Core
1.1.0 - Hyperspin Core essentials

So first, I very much do not recommend importing mame without the mame import tool.

Ok can you give me an idea of what your file names are? Screenshot the overrides folder and your HQ systems view. Does artwork show in HQ?