This page only works in IE.

Open a new browser window (IExplore's File:New:Window option) for each WMP6 instance you want to be active.

Note that once WMP9 is installed to the system, wmpdxm acts as a shim for the old msdxm interface, so you will actually be using WMP9 instead of WMP6. Wmpdxm provides better security, so this is a Useful Feature.