Post installation

Hi all,
I've installed 4.4.0 on apache2, and I'm having problems with URL aliases.
After I've created an alias, lite "MyTestPage", I'm able to use it only in
the following manner: http://mysite/mydrupal/?q=MyTestPage.
With apache 1.3 I'm able to do http://mysite/mydrupal/MyTestPage (same drupal).

I try to mozblog to drupal, but it seems webserver_auth causes troubles. bloggerapi calls user_load(), which doesn't seem tied into webserver_auth. If I use accounts that were set up before I installed webserver_auth, it works. Am I missing anything here?

Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /home/fielddy/public_html/includes/conf.php:88) in /home/fielddy/public_html/includes/session.inc on line 5

I'm getting messages like that on the top of my index page. I just installed drupal and i admit i don't have that much experience with this stuff but this one perplexes me and a friend.

Is it possible to let user to post content with the timestamp field editable by user?(ie. the "authored on" field) But without giving them the administer nodes permission.
It's pretty important to me as I would allow my user to make "future post"

Is it possible to fetch the links that reside in the weblink module to use in another application? For example, i would like to have a list of links of a specific category in my blog, located elsewhere.

I think it should be possible by querying the database. I'm no sql/php expert, so i don't know how to do that, any suggestions? Particularly I like to know how in the database the weblink is related to a certain category.

I cannot turn on the "Don't show banners" in permission. Any idea?

Thanks
k