Usage of Gantt Chart Widget to display Project Planning Gantt Charts

Hi, I want to use the Gantt Chart View form Project Planner(XPP) in a collaboration scenario with some informed / interested user. Then I use the DPM role with the classicl behavior, I can use the Gantt Chart Widget included in PCS very well for this "low level" collaboration. 

In conjunction with the new and famous Project Planner widget, I can´t initiate such necessary collaboration. The only solution I see in the moment to use also XPP for viewing, but it´s a risk, because I cannot restrict to access only to viewing and on the other side the costs increas dramatically. 

I also search for other solutions, like print out or, Report Generation, but it seem´s like no solution. Alos I had a look on Project Intelligence, but it´s an oversized solution for this basic, but neccessary collaboration for information. 

Any idea welcome. Many thanks in advance.