how to move BPs from One Shell to another

Need to know how to move BPs from one shell to another.

The setup is as follows

Created SHELL1

Created BP1-01, BP1-02, BP1-03, BP2-01,BP2-02, BP3-01 BPs in SHELL1 where BPx is a given Business Process so BP1 is Business Process 1 and BPx-yy where yy is the BP records number. BP1-01 means it is record 1 of business process 1

On the upper form of All BPs, there is a linked element to the Shell name, Thus BP1-01 will have SHELL1 as a linked element on its upper form.

Later we create a new shell SHELL2 and want to move BP1-02, BP1-03, BP2-01 from SHELL1 to SHELL2. How is this accomplished?