Disregarding the smartass comment above...:
Remove old card from scanner.
Plug old card into computer.
Copy codeplug from old card onto computer using EZScanDG program.
Plug new card into computer.
Copy codeplug to card from EZScanDG program.
Plug new card into scanner, start scanner.
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You can also do it with the cards IN the scanner, just plugging the scanner into the computer via the USB cable.
However, that's much slower and has a MUCH HIGHER DATA ERROR RATE that can cause codeplug loss or failure in writing.
I'd suggest doing it externally if you can plug the SD card into your computer via an adapter.