please customize your kiosk ISO and edit 003-settings.xzm/usr/bin/xdm to start Xvesa instead of Xorg. i wont give you exac instructions as i have never done this before.
you may have a look on Porteus Superfly which afair uses Xvesa:
Here you can post about your various experiences with PC hardware. You can also post about hardware that is not compatible with the linux kernel or not recommended for use with Porteus.