Version 2.1.1 is from April 2011 making it tricky for us to dive into this in detail, so let me start by focusing on the package.
The reason you do not see contact form package in the "Available Package" view is because the package now require version 4.0 (see http://www.composite.net/Add-on-Market/Packages/Composite.Forms.ContactForm/Installation )
Now, that was a pretty useless response, so I dug out an earlier release of the package which should install on 2.1.1 - download http://hackathon.composite.net/maw/Composite.Forms.ContactForm_C13756.zip and install it as a "Local Package".
I hope this helps :)
The reason you do not see contact form package in the "Available Package" view is because the package now require version 4.0 (see http://www.composite.net/Add-on-Market/Packages/Composite.Forms.ContactForm/Installation )
Now, that was a pretty useless response, so I dug out an earlier release of the package which should install on 2.1.1 - download http://hackathon.composite.net/maw/Composite.Forms.ContactForm_C13756.zip and install it as a "Local Package".
I hope this helps :)