Drupal 6.x

I'm getting pretty exasperated.

My server was upgraded to PHP and MySQL 5.5, and I've been scrambling ever since to get my multiple drupal sites up and running.

To my dismay, I've been finding that even major modules haven't been updated to handle the latest PHP versions.

Right now, I'm trying to get one site up, but when I login I get the following error:

Fatal error: Call to undefined function _privatemsg_get_new_messages() in /home/rpgmap/public_html/includes/common.inc(1762) : eval()'d code on line 4

Dear Drupal gurus,
This is regarding www.dentistrytoday.info ( made in Drupal 6.34) a forum for dental surgeons.
I have installed: https://www.drupal.org/project/insert
to insert images in new topics. But with that module we cannot insert images in the replies to the new topics ( i.e comments).

I just took over maintenance of this site: http://www.affna.org/
I need to change the banner image, the one with the white border that has the words "Connecting You".
The image path is: /sites/all/themes/basic/images/splash_banner.gif
I have only a little experience with 1 other Drupal site, but I remember it had a way to view the files and folders on the server and to upload images.

Hello!
I am upgrading a site from Drupal 6 to Drupal 7, following the instructions here: https://www.drupal.org/node/570162

When running update.php it gets stuck on the first step 'Updating user module' at 0%. I'm wondering if this might be because the site has about 400,000 registered users (another issue there I need to fix), or if something else is going on to prevent it from updating. Perhaps the message

During my clean up activity on my database with the help of Schema module I found that following field 'field_myfield' does not show in admin/reports/fields. But its data and revision tables are present in database.

field_data_field_myfield, field_revision_field_myfield

Following code does not remove these tables from database. Also, i can't see any record related to this field in field_config table. My question is it safe to remove these tables manually?

I have drupal 6 up and running and also using danland theme for my localhost. I was using php code to configure a block, after saving the block and moving it to preface area. The site is messed up, can't access admin page to change anything. I tried using index.php?q=admin, does not work. So when I am viewing source code of my page, I saw the code i typed in the block. But I can't find the source file to edit, please help