Quick Windows 7 Architecture Question

[AWBbox]

Hi guys, I noticed that there don't seem to be different final release editions of x86 and x64 for windows 7. Does this mean that you can install either from a single disk?

I just wanted to clear this up before placing a pre-order.

Thanks!

 

[AWBbox]

A select few sites have been chosen by Microsoft to take pre orders between the 15th of July and the 14th of August. They have started to advertise the product pages but it doesn't mention different architectures, just that it's the 'E' edition.

Edit: The Microsoft USA web site says that both x86 and x64 versions are included in the purchase (assuming this would be the same for the 'E' version), I guess this would mean two separate disks right?

http://store.microsoft.com/microsoft/Windows-7-Professional/product/B985134B