In that case, you have two separate issues.
1) During the spash screen, Kubuntu will pick a graphics chipset to display with and use that one only.
2) Once the AVWizard starts, the wizard will pick a chipset and use that.
If both choose the onboard, and you are using the card, then what you will see is exactly what you are getting - black after the picture you posted. Usually, you will find that both will pick the onboard chipset. In your BIOS, there will be an option to either set the chipset preference, or simply to disable the onboard.
If you can, completely disable the onboard chipset as this will make your life MUCH easier when using the card. Many BIOS's only have the option to set the card as the preferred chipset, not actually disable - if so then choose the card chipset. This will at least allow you to see the kubuntu splash screen. Then it will go black after the install is complete.
If you are able to completely disable: then you should be fine until the AVWizard starts (you don't need to hold shift down to get that unless you have already completed the wizard once and want to go back to it again.) Once it has started, the screen may go black and you get a No Signal message from your monitor. This is because the AV Wizard will default to VGA output. If you are not using this output then you can use the keys 1-5 to choose the correct one (eg. '1' is DVI/HDMI, see the wiki for others) - be SURE to wait at least 15 seconds after pressing the key for X to shutdown, reconfigure and start back up again. If you get a Signal Out Of Range or equivalent from your monitor, then the resolution default (640x480) maybe too low for your monitor, you can use keys 6-0 to choose different resolutions. Again, wait at least 15 seconds after choosing a key.
If you are only able to choose the card as preference, not disable the onboard: the once set you should see the whole installation process, then it ask you to remove the DVD and hit enter to reboot. Once you do this, it will boot up and you will see the normal Kubuntu splash screen but once that has passed it will likely go back to a black screen again. This requires different intervention, get back to us if this is your situation...
NB: in both cases, as you are using a graphics card that isn't in the recommended set and is quite recent, you may have to manually install later drivers before you get the AV Wizard or even the installation process, anyway. But again, deal with the above recommendations first and see how you go..