Setup targeting both x86 and x64?

Question

I have a program that requires both x64 and x86 dlls (it figures out which ones it needs at run time), but when trying to create a setup, it complains:

Answer 1

1. Open a deployment project.
2. In the Solution Explorer, select the deployment project.
3. In the Properties window, select the TargetPlatform property.
4. Choose either Itanium for an Intel Itanium 64-bit platform, or x64 for any other 64-bit platform (such as AMD64 and EM64T instruction sets).
5. At installation time, an error will be raised and installation will be halted if the target computer is not compatible with the specified platform.