The names of the columns in the column chooser are coming from the Key value of the TemplateColumn, TextColumn, etc.
Often these keys map to property names that might not make sense as display names (e.g. Person.ShippingAddress). Is there a way to have that be a display name like Shipping Address?
Off the column is a HeaderText property, that will control what the header text is.
http://help.infragistics.com/NetAdvantage/Silverlight/2011.2/CLR4.0/?page=InfragisticsSL4.Controls.Grids.XamGrid.v11.2~Infragistics.Controls.Grids.ColumnBase~HeaderText.html