1) Why??? 2) Not possible. You need to uninstall windows, buy the 32-bit version and install that.
You would need to install each OS version separately. Then you would need to install all software, divers and devices to each. This will become problematic for sure. I guess I must ask why? The 64bit version will run everything 32bit and give you the access to more memory if you have over 3gig. Also using your MB devices like usb ports, Ethernet connections and sound devices will be a huge pain in the ass since the drivers for each version of the OS are different. If you try to do a duel windows install in 32 and 64 bit be prepared for a life of pain.
You have to reinstall your Windows to change into x32.
This seems like an out-of-the ordinary question really. Windows 7 64-bit is backward compatible with Windows 7 32-Bit. It really doesn't seem necessary at all. If it ain't broke don't fix it
We asked his reason and never got a reply? Makes me wonder if he is even reading our attempts to help?
In my case, changing from 64 bit to 32 bit was a solution from a tech to the game Goat Simulator being jumpy with very little if any control. After reading this thread found via Google, it's not a practical solution. Any ideas?