You are going to install some things. Login in root or use sudo for most of the followings commands.
su -
First you need git.
yum install git
Then you'll need openssl-devel
to compile node.
yum install openssl-devel
Download the lastest version of node, compile it and install it.
cd /usr/local/src
wget http://nodejs.org/dist/node-v0.6.2.tar.gz
tar zxvf node-v0.6.2.tar.gz
./configure
make
make install
Install npm.
curl http://npmjs.org/install.sh | sh
Finally install coffee script. (-g means globally)
npm install -g coffee-script
you can also try the EPEL repo,