A few things....

[rik81]

1. The scraping of media has to improve immensely.... Sega Naomi for instance uses mame roms... and not one game has a logo.
2. How do you add media to a collection? Metal slug collection for instance...  These dont recognize with the media manager and therefore nothing can be created... Id like to add a wheel for it... as well as a theme.  Or is this something being added later.

[thatman84]

Hi,

1. Media is not the focus of the beta and will get updates in due course

 

2. Collections/_override media were added recently and are not fully featured yet. 
 

there is a new update in the works with some fundamental changes. I would suggest trying again when version .37 is released soon. Check back in a few days