<p>I need a WiX 3 script to display to display only 2 dialogs: Welcome &amp; Completed. Thats it no need for EULA, folder selection etc. All help appreciated.</p>

All you need to do is add this in your WIX script, it will give you the WelcomeDlg before the installation and show the Installation progress, then the Exit Dialog.  Don't forget to add the WixUIExtension.dll to your references.
```
```
<UI Id="UserInterface">
  <Property Id="WIXUI_INSTALLDIR" Value="TARGETDIR" />
  <Property Id="WixUI_Mode" Value="Custom" />

  <TextStyle Id="WixUI_Font_Normal" FaceName="Tahoma" Size="8" />
  <TextStyle Id="WixUI_Font_Bigger" FaceName="Tahoma" Size="9" Bold="yes" />
  <TextStyle Id="WixUI_Font_Title"  FaceName="Tahoma" Size="9" Bold="yes" />

  <Property Id="DefaultUIFont" Value="WixUI_Font_Normal" />

  <DialogRef Id="ProgressDlg" />
  <DialogRef Id="ErrorDlg" />
  <DialogRef Id="FilesInUse" />
  <DialogRef Id="FatalError" />
  <DialogRef Id="UserExit" />

  <Publish Dialog="ExitDialog" Control="Finish" Event="EndDialog" Value="Return" Order="999">1</Publish>
  <Publish Dialog="WelcomeDlg" Control="Next" Event="EndDialog" Value="Return" Order="2"></Publish>

</UI>
<UIRef Id="WixUI_Common" />
```
```