How to change default setting of operating system from 64-bit to 32-bit?

Im trying to install a broadband modem on my new windows 7 computer.

However, the installation cd can only operate on a 32-bit operating system using internet explorer for installation to work. Im trying to find a new cd but it costs to get it.



Does anyone know how to change the default setting to 32-bit?

Thank you!!How to change default setting of operating system from 64-bit to 32-bit?
The only way you can do it is reinstalling your operating system.