If you create a new data table by reading in new data from an Excel file, you can copy and paste the scripts from your old data table, to your new data table. All of the scripts will continue to work, as long as the columns in the new data table are named the same, and have the same characteristics as the old data table.
You can also copy each of the scripts from the old data table, to JMP script files, .JSL files, and run them from there against the new data table. The same thing will hold true, that columns that are referenced in the scripts will have to be in the new data table.
Jim