Displaying different dialog on download

Hi,
I have a webbrowser on the form, and I want to display my own dialog instead of IE's when the file is about to download. Is there any way to do this?
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And second, I have Open Popups In Same Window option and this code on newwinow event handler:

Sub Browser_NewWindow2(...)
'...
If mnuViewPopupSW.Checked Then
Browser.Stop
Set ppDisp = Browser.Object
End If
'...
End Sub

This code produces IE error on the page, but nothing else happens. Is there any way to fix this problem?