Object linkage with Copy functionality

Hi All,

I have requirement that when we copy quotation to new, it has to copy the objects which were existing in old quotation.

Exp: I have exist Quotation - Q1 and it has created as follow up from Opportunity - O1. We can see this relationship in docflow assignment block or transaction history AB of Quotation Q1. Now when i copy Q1 to Q2, i want Q2 have same relationship with O1.

Please help me to do this.

Thanks,

Subbu.