So we are planning to have a way..!! good news

I just checked with my VSTO team contact andrew http://blogs.msdn.com/andreww/default.aspx and i got the info in his own words

 "This is not supported in VSTO 2005.We're looking at what is the best way forward for this feature request in VSTO 'v3'."

and i am sure you people know why to believe on his words..!!