When the system freezes, what is the output on the console monitor? The reason I ask is that during the boot process, error messages are redirected to the console as are other system messages. In order to debug the installation, we (or anyone) must have visibility into those messages and other system information provided at boot-time.
Unfortunately, you might need 'take a photo' of the screen messages since the messages are not saved to disk, but that is the fun of troubleshooting