I managed to install ubuntu 12.04 amd64 right now on my 530U3C-A01DE.
What i did was:
First boot windows and do a BIOS-Update, then check that UEFI-Boot is disabled there (the BIOS lags like hell by the way, no idea why).
Then i flashed the ubuntu 12.04 ALTERNATE(!) iso to a sandisk curzer titanium 2GB usb key and bootet from that.
Everything worked perfectly and still works perfectly :-)