Can I add new widget runtime?

I would like to create a mashup quite similar to the Organization page in the composer

so I have two questions:

1) Is it possible to "take" this composer page and include it into a mashup in order to create new units runtime and have the same graphical?

2) If the answer is No, is it possible to add a widget runtime? So that I can write a service which, on button click, will add another button into the mashup next to or under the one which had been clicked

(My solution to question 2, is to create a lot of buttons and hide them all and, on click, make them visible, but althought it is simple I think it is a quite forced)