Simple custom win/lose screens - possible?

Hi all,

I am hoping to replace the default win/lose background with a simple image (not animated or replacing the default ‘Ready up / Return to lobby’ buttons). I have looked for tutes etc but can’t really find anything that works. Is this not really possible? The closest was this (https://www.youtube.com/watch?v=X0tBq1BrbLs) YT tute but I couldn’t make it work for me the way I wanted. I have my widgets created and they display well enough (HUD msg device) when testing. I am not sure how to get them to appear on win or lose for my 2x team based map.

It feels like it should be a fairly simple thing but maybe I am missing something basic.

Thank you for your time.