Use Of Picker.tpl + Picker.js

Hello guys.

I am giving my customers the ability to create their own product package using the picker.js script to load all products and pick every product he wants and then add it in his own package.

I encounter this problem.

When the tpl that shows the form that my user has to pick new items to fill his package up, it is empty.

How can I poplate the form from the start with some standard items etc?

Is there any way to pass to picker.js some product ids for example and show them in the form?

Thanks in advance