You can remove the open id login by deleting the whole open id module - auth_openid folder. You could probably use just CSS otherwise to do { display: hidden;} on the tab you use to click.

You can't, well not easily. Best way is just to use bigger CSS Selectors, and/or get a higher inheritance eg if they are styled like .tab or something just do something like #Content .tab so it doesnt matter what order they are included, your rules are of a higher order.

did you want open id support at all? You could just remove that module completely - or edit the auth_openid/_config file and remove the last line? I think that would effectively 'disable' it

In fact how can I just remove all js libraries from my site so:

<script type="text/javascript" src="jsparty/loader.js"></script>
<script type="text/javascript" src="jsparty/prototype.js"></script>
<script type="text/javascript" src="jsparty/behaviour.js"></script>
<script type="text/javascript" src="jsparty/prototype_improvements.js"></script>
<script type="text/javascript" src="jsparty/tabstrip/tabstrip.js"></script>
<script type="text/javascript" src="jsparty/scriptaculous/effects.js"></script>

I understand that these are used for the CMS backend. But they shouldn't really be included in the live site.

Equally so, how can I add my own in?