Use the "CSIAction" tag.
<CSIAction QuestId="-1" QuestObjective="-1" QuestName="Unknown Quest Name" KeypadOrder="1,2,3,4,5" YesNoOrder="Y, N, Y, Y" FailIfNoCSI="false" />
The usual quest-related attributes are there (QuestId, QuestObjective, etc)
KeypadOrder is only used for CSI's that are...