C528x01.txt     Expanding range of the Standard C528 and other mods.

C528x02.txt     Open up transmit and receive.

C528x03.txt     Simple keyboard frequency expansion.

C528x04.txt     Upgrade batteries.

C528x05.txt     Memory mods.

C528x06.txt     Receive way out of band.

C528x07.txt     Extra functions for the C528.