How do I add a third column to the Details section of a workitem

I am using RTC 3.0.5 and I am using the Web UI.  I have added multiple customized attributes and have added them to the details section of the default editor presentation.  The problem is that I am limited to two columns.  Is there anyway that I can have a third column.  I also tried to create an addition section in the Details slot, I called it Contact Info.  The problem here is that the section is displayed after all of the other slots (e.g Details, Description, Discussion and then Customer Info) I cannot make Customer Info display after Details.  Note:  In the editor presentation the Customer Info section follows the Details section in the Details slot.