Linking a start form to summary page interface using process model.

Hi team, So I have a requirement where in the interface if i click on the product name link in a grid it should go to the summary page interface. But it has to be linked through the process model. 

In the image above, the start form is the home interface. but when i start the process from the process model, it is opening a separate tab for the summary page which is not linked through the process model. So the process is still stuck in the start form. How do i configure the drillable link to open the summary page for that particular product using the process model? 

And the other thing is, the is a button link in the summary page which is visible only when a certain Boolean rule input is false. how do i set it as false as default in the interface itself? I was able to set the process variable false only in the process model before the process starts. 

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