I was having rails versions installed ranging from rails 1.2.3 to 2.3
and i wanted to create rails project that uses rails 2.1.0.
I was got stucked with this problem & finally got solution
You can specify rails version to use while creating new rails application
rails _2.1.0_ simple_blog
The above command will create simple blog application that will use rails 2.1.0
Cheers !
$@ndip
Josh Software 
specify database while creating rails applicationrails demo -d rails _2.1.0_ my_rails_app -d mysql
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