Is there a way to create a USB flash drive that would contain both the W7 x64 and x86 installation files that could be select at boot time for installation?
You could use a image that contains all the versions and types (x86 and x64) and use Universal USB Installer or something like that to make a bootable USB device.
It sure works, and it's super easy Just make sure you have 2 official ISO's, same language, same version (ex. 7601, Professional), both 32bit and 64bit Can't go wrong with Josh Cell Sofwares