Hello Russ,
You will have to download a recent version of Microsoft Office. You can find answers to your questions regarding 32-bit and 64-bit a this website http://windows.microsoft.com/en-ca/windows/32-bit-and-64-bit-windows#1TC=windows-7. I believe when you download the engine Advance Steel will automatically use the correct engine path. You also have a option when dowloading softwares to choose the path.
Regards,
Janet Black