Tiger Admin Theme -Using CSS Images

I wanted to use Steve Smith’s Tiger Admin Plugin for my backend. However, I did not like the loading time for the interface, because first it would show it not styled, then with the original style and then with the Tiger interface.

So for an easy solution I replaced the whole wp_admin.css with the tiger.css. I also uploaded the pictures. I customised the Howdy part and also the footer so it would not display both wordpress logos.

But there is still a problem. Everything is layed out in a list, meaning before when you go to the prestation page for example, the themes would be next to each other but now they are all stacked down but styled in the proper manner. Also the submenus are stacked underneath each other instead of next to them.

Can anyone help me?
Thanks -sorry for the long story. ??
Snipeseye