Hi Rich,
The first three macros, SetTabKey, NextCell, and ResetTabKey should be pasted into a standard macro module. To do this, go to the Visual Basic Editor (VBE) using keyboard Alt-TMV, and then create a blank macro module (Alt-IM) and paste the code into the VBE code pane. The new tab sequence will go into effect right after running the SetTabKey macro (Alt-TMM > Select SetTabKey > Run).
The Worksheet_Change macro should be pasted into the worksheet's event code module. To do this, right-click on the worksheet's tab, select View Code, and paste the code into the VBE code pane.
Excellerate!
Damon