Hi have an old test suite based on Mechanize which I'm moving to IE::Mechanize. One test downloads a file (in mech/lwp you set something like content_type: to a local file name and so forth). IE::Mech is not LWP based, so you can't do this.
Ideally I'd need a way to "right click" a link /select "save target" (and use autoit to process the resulting dialog).