Hello Steve,

One way would be to make the icons transperant like doing to following:

ultraListBar1.ItemAppearance.ImageAlpha = Infragistics.Win.Alpha.Transparent;

Another way might be using a Creation Filter and modify the UIElements in way suitable to your requirements. 

For information regarding CreationFilter please take a look at the following link:

http://help.infragistics.com/NetAdvantage/WinForms/2010.3/CLR2.0/?page=Win_Creation_Filter.html 

Please let us know if you need any other assistance.