Is the setup actuall completing and starting the AVWizard? You would here a series of beeps if it did.
If you heard the beeps, then it just means the video is not outputting correctly. I have had this problem on several computer so far, I just had to choose my output and resolution manually use the number keys as illustrated by the pinned topic in this board.
Otherwise.... while your at a blank screen is there any hard drive activity? Does it seem like the install is still progressing? If so, then allow it to progress until you here the beeps indicating the AVWizard has started up, then follow the instructions as mentioned previously. The install is automated after you tell it which hard drive to use and before the AVWizard comes up.
If neither of those apply, then i'm sorry I don't know what to suggest other than settle with the i386 version. And in i386 versions defense, i'm running the amd64 and I notice absolutely no performance difference, the only real difference between 32bit and 64bit versions is the ability to utilize more than the 4gb limit of memory. I could be wrong and called a moron again... whatever... (how many limits they going to impose on us, first it was 640k, then it was 2gb, now another 4gb whats next?)