Add shipping total costs to subtotal.

Hi
I have set my shipping rates using the weight option, as each product is a different price to ship,
The totals now work fine and the shipping estimator gives the correct totals.
I now wanted to display the shipping costs in the cart subtotal.
As at the moment it just displays the product prices and the shipping is only shown at the checkout part.

I have searched online but could not find an option for this, hope someone can help.

Many thanks

using v1.5

Found a work around, not what I wanted but will do for now,
Now shows shipping at the bottom of the cart rather than the popup box,
So at least appears on the same page so buyers can see the cost is there and not just when they get to the payment stage.

Cheers