I get the same thing installing to Jornada 568 (this is with win2k sp2 desktop)

> I downloaded "MegaCE3v9.3.exe" today and tried to install it. After
> double-clicking on it I got the "Welcome" window, to which i clicked the "Next
> >>" button.
>
> Next I got an "End User License Agreement" window. I click the "Yes" button to
> continue...
>
> A window then pops up titled: "Invalid Windows Setup Files", and contains the
> text: "Application Manager cannot install this application on your mobile device
> due to an invalid setup file. Reinstall and try again."
>
> Needless to say i tried reinstalling multiple times...
>
> Also, is there a list of ROMs that work with MAMECE and MegaMAMECE? And where
> can I download these ROMs from?
>