I had a similiar issue on an old toshiba portege. It was Bt3 and I used freedos to boot into grub. I think.
Have you tried going thru Vmware?
Have you checked the MD5 of your iso ?
Clean your laser on your dvd drive using a cleaning disk, burn the iso at a really low speed and see if you can get past the keyboard selection screen.
Have you used the live boot version and have had no issues?