If you're up for a walk on the wild side, try StartUp Manager (SUM), a utility created by Glenn Van Loon that lets you change bootloader and splash screen settings in Ubuntu.
Read the article at Linux.com
There are two easy ways to install SUM, once you've verified that it works on your version of Ubuntu. The first is to add the requisite repository to /etc/apt/sources.list, and then use apt-get or Synaptic to install the startupmanager package. The second is to download the package's .deb file from the SUM Web site and install it using dpkg. Be sure to read and heed the ***WARNING*** on the project's main page before attempting to install and use SUM, as it is possible to render your system unusable. I managed to bork mine.