i will do the same,
put it in a subdirectory, but i didn't have tried it yet.
my probleme is not to run multiple rails app,
but juste keep my server well organised !
(because i have on it :
- roundcube (webmail)
- galette (customer management)
- wordpress (website)
- owncloud (synchronized files over multiple desktop)
- virtual reality tour
- database management
- and other stuff.
each one has their own index.php files...
guess the rapid mess it can be..
and the nightmare for updates...
(all software are not has simple as wordpress...)