install multiple nodejs versions, use same npm packages

install node

#
# node  --------------->  ~/.nvm/<node-version>/bin/node
# node-libraries  ----->  ~/.node_libraries
# node-binaries  ------>  ~/.node_binaries
#
aptitude install g++ curl libssl-dev apache2-utils make
git clone git://github.com/creationix/nvm.git ~/.nvm
vi ~/.bashrc
    export PATH=$PATH:~/.node_binaries
    NVM_DIR=$HOME/.nvm
    . $NVM_DIR/nvm.sh
    nvm use
nvm install v0.2.5
nvm use v0.2.5
mkdir ~/.node_libraries
mkdir ~/.node_binaries
git clone http://github.com/isaacs/npm.git tmpnpm
tmpnpm/cli.js install npm \
              --root ~/.node_libraries \
              --binroot ~/.node_binaries
rm -rf tmpnpm
npm config set root ~/.node_libraries
npm config set binroot ~/.node_binaries
nvm help
npm help
npm install connect spark express jade