delta links

I followed SAP's recommendation to make copies of the original ESS Portal objects (iViews, Pages, Worksets) so that customer modifications do not happen on the original SAP objects. I have therefore created delta-link copies for all the original SAP objects. However, the "delta-link copy" pages I created use original SAP iViews, not my "delta-link copy" iViews. So customer modifications to the copied iviews will have no effect. One option I have is to re-attach the delta-link-copy iviews to delta-link-copy pages, but in the future SAP may change the relationship page-iView and then my system won't work (or won't take advantage of the SAP enhancement). Any other ideas?