I interpreted the OP that currently he has 1000 cells with options "apple,banana,pear" and he wants 1000 cells with options "Able,Baker,Charlie".
"I need to change the selection for all lists" can be interpreted many ways.
I don't think VB is required for most of the possible interpretations, unless the OP want to increment the current selection by the same amount,
e.g. all "apple" > "banana" all "banana" > "pear" "pear">"apple"
I trust that abaxter will tell us what it is he wants.