SQL 2005 Standard From Ready To Launch. Is It X64?

I just set up a server with Windows 2003 Standard x64. I have a copy of SQL Server 2005 Standard Edition that I got from the Microsoft Launch event. On the back of the case, it gives version requirements for both the x86 and x64 versions. When I went to install it, it didn't ask me which one I wanted to install. When I look on the CD, I see different installers for x86 and x64 for various pre-requisites, like MSXML. As I'm installing SQL Server I see that it is installing most things to "C:Program Files (x86)" which is where 32-bit programs go.. I decided to let it finish. Most of the binaries and everything, include sqlservr.exe, are in the Program Files (x86) folder, but it did install a few things in Program Files, so it must be aware of the difference.

I checked task manager and, I see that the sqlservr.exe and SQLAGENT90.exe are NOT 32-bit processes. So, great, they're running natively in 64-bit mode! But when I look at the server options in SQL Server Management Studio, the patform is listed as NT INTEL X86. The memory page also shows an option to use AWE which according to the documentation is only available and relevant to 32-bit installations.

SO I'm pretty confused. Almost everything points to this being an x86 installation, but the running processes are running natively in x64. Does anyone know what's going on here?

I just tried to run the x64 version of SP1 for SQL 2005, and it told me that it cannot update x86 products, so I guess that clinches it. I'm still pretty confused and annoyed though. If this isn't x64, how can I get an x64 version of the same product, and will my license key work?