stackFileType Equivilent for Windows?

[Edwin Gore]

I'm wondering if there is an equiviet to StackFileType for windows that will automatically default the save dialogs to using a specific filetype description and extension.

I ask because I would prefer to use Revolutions built in detection of whether a stack has changed etc, but if I do that, then it always wants to save my data-stack as a .rev file, even if I choose a "all file types" and manually type in a different extenstion i get file.XXX.rev . It's irritating...

Thanks!