Hi Tracy, Try this... (Note: I did this for a task or issue report since you said Project Priority. If this is for a project report, just remove the {project}. that I have put in)
group.0.name=
group.0.valueexpression=IF({project}.{priority}="4","Red Alert - First Priority",IF({project}.{priority}="3","Due Today",IF({project}.{priority}="2","When You Can Get To It",IF({project}.{priority}="1","Low Priority","No Project Priority Given"))))
group.0.valueformat=HTML
textmode=true