The link below is to a HTC User Guide for 2.3.3. It is not specific for the HTC EVO Shift 4G, but seems to cover most of the features in the Shift 2.3.3 Maintenance Update and includes HTC Sense. enjoy..
http://dl4.htc.com/web_materials/Manual/HTC_Desire_S/110302_Desire_S_HTC_WWE_UM.pdf
http://dl4.htc.com/web_materials/Manual/HTC_Desire_S/110302_Desire_S_HTC_WWE_UM.pdf