Grub splash

There are images to pick up when install grub-splashimages. Or better still, add your own image inide the system.

There's GUI to manage grub namely Startup Manager (SUM) for Ubuntu but is not available in Debian etch.
I found the tutorial at debianadmin.org. Here's some quote:

If you want to Configure grub and usplash using Simple GUI Interface here is the tool called Startup Manager.This is a simple pyton script.

Startup Manager Features

You can Change grub timeout, default boot title, visibility of grub menu and usplash text,bootup resolution and color

depth,grub menu colors and background,usplash theme.

Password protect grub menu from editing

Install new grub backgrounds(either from a png, or a correctly sized and colored .xpm or xpm.gz)

Install new usplash themes(from a correctly made .so file)

Preparing your system

First thing you need to install imagemagick

sudo apt-get install imagemagick