How to customize the login background image

All,

Very simple question... today I was working with an ALM installation - 17.0.1P1/Windows - with a client, but they would prefer a company branded image at the login-screen presented once ALM Client Launcher starts the application window and queries for credentials (also when using webadmin).

There is a topic here, about one year old, addressing this query (referring to KM000015671) but first of all, it is pertinent to ALM 15, so paths are odd, and secondary... even though I locate the deplyment directory in my installation, which has some different path... it still refuses to work, even though I have tried basically any image size from 1280 x 1080 down to 128 x 128 - no matter what I get the standard splash-screen.

Anyone who has got this to work on 17.0.1 ? If so.... how?

Any ideas?

Kind regards,
Per