Possibility to change Due Date while Siebel generate Activity by Event creation?

Hi,

My users asked if the Due Date of Event type Activitiies, which are generated by Event creation (BC : eEvents Event), could have End Date of Event, instead of current timestamp.

I can see that the Due Date field of Action BC has Predefault value : "System : Timestamp", and this must be common for any Activity records.

I am looking for the way how to capture the End Date of Event and put the value into Due Date of Activity.

Apart from changing pre or post default value of this Due Date field, is there any way to capture the event when Siebel generate Event type Activity by Event creation?