I have AFA installed on my A4000/060 with Picasso IV, and I must say it works like a charm. My workbench looks so much better with it.
The installation of AFA doesn't overwrite anything.
If you don't like it, the only thing you have to do is to remove the AFA_OS_loader command in startup-sequence.
One thing though.
You have a deneb, so it's best to put the 'morelibspace_module' in the flashrom of the deneb instead of putting it in startup-sequence.
This command is necessary to make use of the AFA libraries.
Regards,
Lloyd
