HostingRails.com

Assuming you want it setup where ~/public_html is your DocumentRoot (this is the default for cPanel accounts' main domain) then upload your app to ~/ and symlink app/public to ~/public_html.  Make sure your database.yml is configured correctly and you've run any necessary rake tasks - e.g. 'rake db:migrate RAILS_ENV=production'.  

Then contact support with your domain name and have them change your vhost accordingly for mod_rails.  That's it.  

Thanks. That worked great.
And for restarting I just SSH and "touch app/tmp/restart.txt" ?

Yes. Exactly, that should do the job for you. Let us know if you've any questions.