Module development and code questions

Thank you to those involved with the Snap Preview module. One question though. On the Snap website when you register and they generate your specific key code Snap offers you the option of insterting your own web site's logo into the bottom right corner of the Snap preview window. In the Drupal module installation there is no option for that. Is there a way that the modules code can be edited to offer up that feature?

Thank you.

Drupal 4.7 had two methods to import style sheets:

theme_add_style() and theme_stylesheet_import().

Does Drupal 5 have any equivalent methods?

How should I setup the SMF? Should I use the same database naem, just different prefix?

I need to get the 5 star voting widget to appear inside the comment form, so that rating and commenting are tied together visually. I know that I can do it (sort of) by theming the comment form with theme_comment_form, but that's not really doing what I need. Is it possible to use hook_comment something like this?

This is driving me crazy. The titles of nodes seem to come from the node_revisions table rather than the node table. I noticed this when running hook_nodeapi to update the node title.

Okay, so that is not so bad but if I update the title in the node_revisions table then the link (FK) from another table breaks completely Why aren't things matching? What is causing this weird behaviour??

I have an external (non-drupal) product that can be communicated with via an API and would like to allow users to use their logins for that to access my site, just like I can now login using seanr@drupal.org at some other Drupal sites. The only problem is that the login form requires three fields, not the usual two: campaign, username, and password. How can I add that campaign field? Basically, I'm trying to create a customer portal. I don't want to have to enter the username like an email address (i.e. no @drupal.org) either.