From ver.2 inno setup handles config files.
Both spyblaster and spybot use inno.

Quote:


/LOADINF="filename"
Instructs Setup to load the settings from the specified file after having checked the command line. This file can be prepared using the '/SAVEINF=' command as explained below.


Don't forget to use quotes if the filename contains spaces.


/SAVEINF="filename"
Instructs Setup to save installation settings to the specified file.
Don't forget to use quotes if the filename contains spaces.




might be handy