>Thanks Rick,
>
>I was thinking of copying the class from version 5 to 6.
>In your opinion, do you think that would be contra-indicated.

FWIW, my personal preference is to do this sort of thing in a way that doesn't modify SDT itself. There are at least two benefits to this approach, the first being that SDT remains unmodified, and the second being that a future update won't require you to re-apply your changes or additions.