The text based installer may look different to the screenshots, but the options are identical. Even if the installer can run on your hardware, there's no reason to think the desktop won't. I'd just proceed with the installation in text mode, making sure the graphical desktop is configured during installation.
This problem isn't limited to Mandriva, I couldn't get the SUSE 9.2 installer to run graphically on my VMWare setup, but the installed system had no problems.
"Insanity: doing the same thing over and over again and expecting different results." (Albert Einstein)