ASP Calendar Customization 2

Currently, the client can create a recurring event (a customization done 3 months ago). But, when the client makes an edit to the details, they have to edit each recurring date - one by one. Client would like add the following: 1. Client makes edit to recurring date. 2. Would like a check box to make the edit (a) pass to all the recurring dates or (b) apply only to the date she's on. The free calendar they downloaded can be seen here: [login to view URL] Thank you!