Jean-Pierre Paradis's Blog: How to switch between the 32-bit versions of ASP.NET 1.1 and the 64-bit version of ASP.NET 2.0 on a 64-bit version of Windows

This article discusses how to switch between the 32-bit version of Microsoft ASP.NET 1.1 and both the 32-bit version and the 64-bit version of ASP.NET 2.0 on a 64-bit version of Microsoft Windows.

Source : Microsoft.com