Error installing Postgres module in Node.js and 2 other node.js questions

I am having trouble installing the Postgres database module for Node.js, every time I run the command "npm install pg" I get the following error:
C:>npm install pg
npm http GET https://registry.npmjs.org/pg
npm http 200 https://registry.npmjs.org/pg
npm http GET https://registry.npmjs.org/pg/-/pg-0.12.1.tgz
npm http 200 https://registry.npmjs.org/pg/-/pg-0.12.1.tgz
npm http GET https://registry.npmjs.org/generic-pool/2.0.2
npm http 200 https://registry.npmjs.org/generic-pool/2.0.2
npm http GET https://registry.npmjs.org/generic-pool/-/generic-pool-2.0.2.tgz
npm http 200 https://registry.npmjs.org/generic-pool/-/generic-pool-2.0.2.tgz


C:\node_modules\pg>node "C:\Program Files\nodejs\node_modules\npm\bin\node-gyp-b
in\....\node_modules\node-gyp\bin\node-gyp.js" rebuild
'pg_config' is not recognized as an internal or external command,
operable program or batch file.
gyp: Call to 'pg_config --libdir' returned exit status 1. while trying to load b
inding.gyp
gyp ERR! configure error
gyp ERR! stack Error: gyp failed with exit code: 1
gyp ERR! stack at ChildProcess.onCpExit (C:\Program Files\nodejs\node_module
s\npm\node_modules\node-gyp\lib\configure.js:420:16)
gyp ERR! stack at ChildProcess.EventEmitter.emit (events.js:99:17)
gyp ERR! stack at Process._handle.onexit (child_process.js:678:10)
gyp ERR! System Windows_NT 5.1.2600
gyp ERR! command "node" "C:\Program Files\nodejs\node_modules\npm\node_modu
les\node-gyp\bin\node-gyp.js" "rebuild"
gyp ERR! cwd C:\node_modules\pg
gyp ERR! node -v v0.8.17
gyp ERR! node-gyp -v v0.8.2
gyp ERR! not ok
[email protected] node_modules\pg
└── [email protected]


This error occurs on both my work machine (linux/windows box) and my personal machine (windows) at home. Any ideas?

Also I should mention I already have Python 2.7.3 installed.

Also I have two more questions related to Node.js:

1) I've heard that there are two different ways to connect to the database using Node.js, one way is via javascript using the pg module and the other is via a native extension (can't remember the name). What do you guys recommend me to use and which is easier/better for a novice in Node.js to pick up?

2) I've read people write about developing in either Node.js only, or via Node.js/Express combo or Node.js/Knockout library. Is one better than the other? This is in terms of the web application able to access a remote database (as per our project).

I am new to Node.js so hence the basic questions! I am not just doing this for work but for personal projects (I have preference for node.js over RoR) as well so all help appreciated! Thanks!