How to maintain multiple versions of rails in one PC

hey everyone i am using rails 2.3.8 and ruby 1.8.7 . i want to
install rails 3 so how can i maintain 2 versions of rails in my pc. i
wanna learn rails 3 and can any tell the major difference in 2.3.8 and
rails 3.

for using different versions of rails in same pc, use Ruby Version Manager

Use rvm to manage multiple versions of ruby and rails.

Colin

No problem. This need is fit with RVM

try it

hugs
http://beginrescueend.com/rvm/install/

pik on windows.