How can I write an openSUSE script that will change my boot menu.lst file and add "nomodeset" automatically both to failsafe and normal boot option?

How can I write an openSUSE script that will change my boot menu.lst file and add nomodeset automatically both to failsafe and normal boot option? This script is for SUSE Studio I'm going to write it under the "Run script whenever the appliance boots" for the first boot.