After the menu comes up to Install, run liveCD, check CD integrity etc, hit F6.A little text prompt will pop up with stuff already in it. Put:irqpollright after it. That worked for me, but I still see the ACPI / RSDP error you get during bootups etc. But ubuntu 6.06 runs fine.NOTE: If the irqpoll didn't work, try:noapic nolapic