@killarbee
1. install the cblogin module included in the communitybuilder package
2. activate the cblogin module in a position you do not use in your template and give it a title with a single word, e.g. "CBLogin" (or just rename the original title)
3. install the bot "Module Insert" and activate it
4. go to static content and create a new static content page, e.g. "Members login"
5. just include the bot text, e.g. {insertmodule module=CBLogin}
6. create a link in the main menu to this static content page
Hope this describes the usage. For questions just post here.
JoomlaZ