So wie es ausschaut komme ich ohne 64bit nicht weiter:
"In order to be EPM-compatible, Toolbars and BHOs must be available in 32bit and 64bit flavors, to avoid toolbars or other UI appearing and disappearing as you navigate between zones that run at different bitnesses. To load in EPM on Windows 8, the add-on must also indicate that it is compatible with the AppContainer isolation feature by registering with a
COM Component Category that indicates that the component was designed and tested to ensure it runs correctly in the no-read-up process."
http://blogs.msdn.com/b/ieinternals/...o-desktop.aspx