For special installation needs you may use the sub menus
    You may choose your Raid level and more

For incompatibility video cases you may use the sub menu
    RAID and LVM installation options using the Vesa video driver

How to get back to the Installer menu
    Use the 'Escape key'

How to edit the boot line option of a menu
    Use the 'Tab key' 

At the boot prompt "Press Enter Key" to get back to the installer

For support issues our community forums are at
    http://forums.contribs.org

Bug reports and reports of potential bugs should be raised at
    http://bugs.contribs.org

The documentation of the project may be found at
    http://wiki.contribs.org/SME_Server:Documentation