How to access the 64-bit registry from a 32-bit Powershell instance?

Question

If you launch a 32-bit instance of Powershell (%SystemRoot%\syswow64\WindowsPowerShell\v1.0\powershell.exe), then the registry provider only sees the limited 32-bit parts of the registry.

**32-bit console**
PS> (dir HKLM:\SOFTWARE | measure).count - (dir HKLM:\SOFTWARE\wow6432node | measure).count

0

**64-bit console**
PS> (dir HKLM:\SOFTWARE | measure).count - (dir HKLM:\SOFTWARE\wow6432node | measure).count

-5

Is there any way to force the provider into 64-bit mode? I could drop down to [Microsoft.Win32] .Net APIs, or maybe WMI, but I'd rather not. I'm using Powershell v2 CTP3 if that expands the possibilities at all.