h0mer,

Try using the UltraTabbedMdiManager's TabFromForm() method to get a reference to the tab that was created, then use its Reposition() method to move it.  For example:

            Form2 f2 = new Form2();
            f2.MdiParent = this;
            f2.Show();

            Form3 f3 = new Form3();
            f3.MdiParent = this;
            f3.Show();

            Form2 f22 = new Form2();
            f22.MdiParent = this;
            f22.Show();

            MdiTab tab = this.ultraTabbedMdiManager1.TabFromForm(f22);
            tab.Reposition(this.ultraTabbedMdiManager1.TabFromForm(f2), MdiTabPosition.Next);

By default, f22 would show at the end of the group (after F3), however, using tab.Reposition(), I have moved it from the end to the middle, making it the next tab after f2's tab.

Hope this helps,

~Kim~