Wow, painting is wonderfull. But if the keyboard don't work that is a very expensive A600.
To replace the keyboard are just 3 ways:
- Buying a dead A600 to use the keyboard;
- Use an Aminet hack, using a big case Amiga one
- Buying a Lyra from Individual Computers or keyboard from Elbox.
See also
http://www.amiga600.de/ :-D