I don't know which config is behind the "A4000 item" in Amiga Forever.
I would suggest to add an FPU to the config if it is not yet present.
If the OS is 3.1 you might also need to upgrade SetPatch
http://aminet.net/package/util/boot/SetPatch_43.6b
(Check version numbers! Only replace the file if the Aminet version is higher than what you already have!)
PPaint does not need installation.