Ken,
you have backups allready - the memory cards that are in the OP25 and the OP27.
If you need additional backups:
For the OP25, you must move the program to the internal FLASH on the unit. This is only possible if this function is programmed into the application. Try to see if there is a button with an icon where the arrow points in the other direction (towards the OP). If you can do that, then you can insert a fresh memory card in the OP and copy the program from the internal FLASH to the card. You must use the button I told you about in the previous post (if it exists).
For the OP27, you can do the same or you can use the Prosave utility.