Help with theme override, profile search

Hi!

I have been hunting the site and I've got things almost the way I want them (I can't believe I used to use e107). Just a few questions:

1. if I access /drupal/profile, the little profile boxes are now themed perfectly, but I want to alter the page title, and add some text above the list of profile boxes. At the moment the title is "User List" and I can't figure out what to override or do to change the layout of that page...

2. What do I override or do, in order to theme the pages where a user modifies their profile details? The default is very bland, and I want to colourise the table, and add javascript to some of the controls there (ie, user_country, to refresh the provinces list). I also want to create some of the controls for profile_* fields myself, rather than use the default (ie, three checkboxes on one line).

3. The same question as above, regarding the page where a single profile is viewed, ie, /drupal/user/4. I can only figure out how to theme the user list, and not individual profiles in full view.

4. I've (carefully) taken a chainsaw to Drupal in areas where I am not sure. I want to outline my user search procedure here, and I hope you can tell me if there is a better or more standard way to do this:

I've added a search form in the page blocks. The action script sets a variable in $_SESSION called profile_search_filters, which contains the fields entered in the search bar. Then, in user_profile.tpl.php, the code which displays each profile box, theres a few statements examining this variable: if(!$_SESSION['profile_search_filter']){ drupal_goto(); } and some comparisons too, which allow each profile to display or not display depending on the search filters defined. This seems a bit easier for a total newbie, than doing database queries... it also fits in with the existing /drupal/profile list page. I'm not sure though, how this will scale.

Any comments or suggestions as to how I can better manage this? They would be appreciated..

cheers
cb