Adding a new tab to CrystalReportViewer and loading a new rpt into it

Hi,
I've been struggling with the following problem for a few days now and I would really appreciate any help you can offer.
I need to add a new tab to an existing instance of CrystalReportViewer and load a new crystal report (RPT) into it.
I wasn't able to do that and tried inserting an instance of a new CrystalReportViewer into the new tabpage, but I've encountered several problems with that solution as well, such as: by hiding the tree and all bars, I'm also removing the page navigation field of the new rpt.
Here is the code I've used:
TabControl tabControl = (TabControl)((PageView)crystalReportViewer1.Controls[0]).Controls[0];
DocumentControl tab2 = new DocumentControl(new ViewerDocument(new SubreportContext()));
tabControl .Controls.Add(tab2);
tabControl .TabPages[1].Text = "New Tab";
tabControl .SelectedTab = tab.TabPages[1];
Now I need to load the rpt to the new tabpage
If I'm trying to add a new CrystalReportViewer into the tabpage:
ReportDocument oRpt2 = new ReportDocument();
oRpt2.Load(tempFile);
CrystalReportViewer newViewer = new CrystalReportViewer();
newViewer.Dock = DockStyle.Fill;
newViewer.DisplayGroupTree = false;
newViewer.DisplayStatusBar = false;
newViewer.EnableDrillDown = false;
newViewer.DisplayStatusBar = false;
newViewer.DisplayToolbar = false;
newViewer.ReportSource = oRpt2;
tab2.Controls.Add(newViewer);
Please let me know what is the best practice for this kind of operation.

Continue my question....
I've found a method that opens such a tab for me in one statement:
DocumentControl tab2 = ((PageView)crystalReportViewer1.Controls[0]).CreateNewReportDocument("new doc");
But I remain with question of how to load the new RPT into it?

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