Instructions can be found on the rails wiki , just skip the patching instructions, they are not needed anymore. The Fireruby adapter works great, if you follow the usual naming conventions for ActiveRecord. If you find it hard to connect to a database make sure you set the correct character set encoding in your database.yml file and add your database path to aliases.conf.
My current set up is the following:
- Rails 1.1.2
- Ruby 1.8.2
- RadRails plug in for eclipse
- Firebird 1.5
- Debian unstable (sarge)