Module development and code questions

If I discover some information during the authentication process that I want to associate with a user for the duration of their session, is there any means of doing this? From the hook_auth funtion, I don't have any idea which user it is that was authenticated, but the remote authentication server sends session data that I want to keep with the $user for later use. I could place this data in $_SESSION, but at what point would it be appropriate to assign it back to the authenticated $user? hook_user('login'...)?

Just a friendly warning, do not use updates (and I am told manager) as a module names.
These are special names in Apache and the module will not work if you have clean url's turned on (you get a Page forbiden message).

I found this out after developing a module called updates on a win server and then installing on the real site.
Three cheers for search and replace :).

I have the RSVP module installed.

For some reason, whether its needed or not, the rsvp.css file is always included at the head of every page.

Its a small file, but the bandwidth can add up, and its unnecessarily being called when rsvp's arent being used.

Am I mistaken somehow?

If i'm right, is there an easy way to fix it?

For example, a 3-day conference. Can this be done with the Events module? I would like my calendar to display a block of a "weekend event" in a certain color, and that color be associated with a particular node.

Thanks!

I keep going over and over the Handbooks Module Guide's explaination of the node building mechanism. Nothing seems to match anything in the present Drupal system.

I want to modify the "Browse files to dowload" text in Filestore2. There are three occurances of the text in the code. I have marked each one. But when an anonymous user surfs to the page there is another unmarked text title at the top. Where is this text hiding?

Some where in the database probably? But where?