CRM 2013 In Opportunity form, how do we create new Opportunity Product in new window??

Hi Everyone,

In CRM 2013 Opportunity form there is a subgrid for related Opportuntiy Products. The '+' button opens up a new Opportunity product record in the same window. 

But I wish to pop up a new window for new Opportunity product.

I wish to get a suggestion if this can be done in ribbon editor or by custom code

Please help me


Regards,
P Wesley