not a linux guru, but I'll try my very best:
There is probably also a lot of information already on your computer. Try typing info:grub
in the location bar of your konqueror browser. You can also read the info page online
You can download the newest grub rpm from SUSE
and install it (try clicking it. That should work
Creating and installing your own splash screen:
There is a good web page on the creation and installation of a grub boot splash
I hope this has helped you.