where to put OpenID selector code?

I have the OpenID module installed but I'd like to offer the ability for users to use third party logins (blogger, yahoo, etc) as well. JanRain's ID Selector code supposedly allows for this.

I'm not a terribly experienced developer so I am somewhat confused as to where precisely to put the code once it is generated for my site. The instructions also indicate

"the ID Selector button expects your OpenID input field to have an id attribute with the value openid_identifier"

I hope this is an easy question. Any help would be much appreciated.