The "change directory messages" are obviously displayed when changing directory. You can edit them either by adding the following code to the '.ioFTPD.message' file of the directory (works for specific directories) or by adding the same code to '..\text\ftp\stat.msg'.
Code:
%[execute(EXEC ..\scripts\ioA.exe)(logon)]
Note: stat.msg is used when someone uses LIST but won't be if you use STAT -l to perform this operation.