Questions with installing .NET

[helix400]

Hey all,

We've converted our app to .NET 2.0, and we're ready to release it to beta testers. But that means I need an installer. While researching what I need to do, I got confused, and figured it'd be best to get other opinions before I continue. My questions are these:

.NET 2.0 requires a Windows Installer 3.0 (for Windows 2000/XP/2003) or Windows Installer 2.0 (for Windows 98/ME). Should I bother checking and installing if users don't yet have the necessary Windows Installers? Or is it a save bet that virtually all computers in daily use now have those Windows Installer versions already installed?

Also, do I need to worry about x64 installations? For example, lets say some people are running an x64 version of Windows. If I install the x86 .NET 2.0 redistributable on their machine, will that cause problems?