Msi installer should allow multiple installations of same version

The Windows .msi installer should allow multiple installations of same version.

For instance, if you install one 5.5 (or 5.2, or whatever), instance via the .msi installer, you cannot then install a second instance of the same version with the msi, as it will only allow you to "repair" or configure your existing instance.

You can, say install a 32-bit version of 5.2 and then a 64-bit version of 5.2, but it should allow for 2+ 64-bit versions if I so desire.

Many thanks.