How to enable bootsplash theme on 12" monitor?

Hi everybody, this is my first post.

I had bootsplash theme in my installation process, now I don’t. It was the problem on Linux Mint on this laptop too.Linux Mint has some tool that is called start-up manager. I had to set resolution on 800x600 8bit. How to do it in openSUSE?

Anybody?

I have openSUSE 11.0 GNOME.