How do I load another calendar

Hi

I have Windows Live Mail installed on my PC and use it with my Hotmail Address and it also has my Calendar.

My wife used WLM on her PC for her Gmail address and also used the WLM Calendar.

Now my wife's PC has broken down and I have added her Gmail address to the WLM accounts on my PC, is there some way I can also add the

Calendar that was with the WLM on her PC?

Thanks

Daniel