The v9 installer will install whatever bundle or plug-in you want it to. Just check the box. I wasn’t given any option as to whether to install the 32-bit or the 64-bit versions of the plug-ins during the online installation, so that I can’t help you with.
Here’s what happens:
if you check the box for a plug-in to be installed by the v9 installer:
The v9 version will be installed. If a lower version of the same plug-in is already installed, it will be updated. You can go back and re-install the v8 or lower version of any plug-in with that version’s installer. Given that XP SP3 is 32-bit only, I imagine the installer was designed to only install the 32-bit version and not give me a choice.