Fairly certain every Vista disk contains every version of it, from Home Basic to Ultimate and the 32-bit and 64-bit as well.
Yep it is my impression that the 32 bit and 64 versions of Vista will be packaged together [ except for the absolute minimum spec Vista, perhaps ] but as far as I know, when one registers the software with Microsoft one has to choose either the 64 or 32 bit version and I am doubtfull if MS will allow you to change from the 32 bit to the 64 and Vice Versa free of charge or at a nominal/low cost after one has registered the Vista with MS.
Best and Warm Regards
Adrian Wainer