That just turns the logo on or off. If there is an old logo there, you don't need to do the 2122 command.
to change the name on most Casio machines:
Turn key to Program mode
2 SUBTOTAL
132 SUBTOTAL
Now type the characters for the first line of the receipt using the alphabet on the edge of the buttons. If someone has removed the letters from the keys, just find the alphbet layout in your manual.
00 (double zero button)
CASH (maybe labelled CA/AT)
232 SUBTOTAL
Now type characters for second line
00
CASH
332 SUBTOTAL
Now type characters for third line
00
CASH
432 SUBTOTAL
Now type characters for fourth line
00
CASH
SUBTOTAL
NOTE: You might have to do 2 receipt prints in REG mode to see the changes
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If anyone is looking for / needs a Casio PCR-T2000 manual,
http://the-checkout-tech.com/manuals/cashregisters/Casio2.php