How are you experienced developers coping with upgrading your clients?
Most, if not all, of my future changes will be in the Modules, not the
worksheets. My current upgrade plan is something like this:

1. Have client open both upgrade and old workbooks.
2. Upgrade will have single sheet containing a command button. Sheet
may also contain the macro code or a call to a module routine.
3. Button will copy old workbook sheets (some protected, some not) to
upgrade.
4. One copied protected sheet will require adjusting formulas that will
retain the identity of the old workbook's filename (gathers data from
other sheets). Upgrade code will do this.
5. Last act of upgrade macro is to delete the upgrade sheet (if
possible, not sure how this can be done yet if code is contained in the
sheet itself).

Your input is greatly appreciated....

mike