Set image to the max height of grid - windows-phone-7

Question

In my XAML I have a listview. The item template of the listview contains a grid. This grid has 4 columns and 2 rows. Like so:
I want the left column be filled with an image and a colored bar under the image. My core problem is that the image will most of the time determine the height of the item. While the image max height is supposed to be defined by the rest of the item. So minimal 100 (Grid MinHeight="125" - Height="25" of the rect). Or larger if the text makes the item larger. But the text is supposed to define the height of the item. Not the image.
My current xaml is the following:
<Grid MinHeight="125">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="auto" />
<ColumnDefinition Width="2*" />
<ColumnDefinition Width="*" />
<ColumnDefinition Width="48" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="auto" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Grid Grid.Row="0" Grid.RowSpan="2" Grid.Column="0" Width="100">
<Grid.RowDefinitions>
<RowDefinition Height="auto" />
<RowDefinition Height="25" />
</Grid.RowDefinitions>
<Image Grid.Row="0" Source="{Binding Path=BitmapImage}" Stretch="UniformToFill" />
<Rectangle Grid.Row="1">
<Rectangle.Fill>
<SolidColorBrush Color="{Binding Path=Color}" />
</Rectangle.Fill>
</Rectangle>
</Grid>
<TextBlock Grid.Row="0" Grid.Column="1" Text="{Binding Path=Name}" FontWeight="ExtraBold" TextWrapping="Wrap" FontSize="16" />
<TextBlock Grid.Row="1" Grid.Column="1" Text="{Binding Path=Description}" TextWrapping="Wrap" FontSize="20" />
<TextBlock Grid.Row="0" Grid.RowSpan="2" Grid.Column="2" Text="{Binding Path=Type}" HorizontalAlignment="Center" VerticalAlignment="Center" TextWrapping="Wrap" FontSize="20" Margin="5" />
<TextBlock Grid.Row="0" Grid.Column="3" Text="{Binding Path=Distance, Converter={StaticResource DistanceConverter}}" FontSize="16" />
<Image Grid.Column="3" Grid.RowSpan="2" Source="/Images/appbar.next.rest.png" Stretch="Fill" Width="24" Height="24" />
</Grid>

Answer 1

http://darutk-oboegaki.blogspot.com/2011/07/binding-actualheight-and-actualwidth.html contains information on how to do this, accounting for the fact that in Silverlight, ActualHeight commonly gives a value of 0.
From there, if you need to subtract 25 pixels, you can:
Write a converter (an object that implements System.Windows.UI.Xaml.Data.IValueConverter)
Add an instance of the converter into the Resources of the page/window.
Add Converter={StaticResource MyConverter}, ConverterParameter=25 to your binding.
Hope that helps :)