Dashboard, site not accessible, get "function require" messages

Site: http://scribblerstravels.com/
WP Version: 3.0.1
Theme: MyStream
Problem: can’t access dashboard or website. See message below.
This is what I did:
Manually upgraded WP to 3.0.4:
1) updated plugins,
2) disabled plugins,
3) deleted wp-admin and wp-includes,
4) uploaded 3.0.4 wp-admin and wp-includes,
5) uploaded the entire 3.0.4. wp-content file to the root directory for Scribbler’s Travels (that did not follow WP’s guidelines for manual upgrade). I did not replace the 3.0.1. wp-content file with the 3.0.4 file.
6) uploaded the remaining “loose” files to the root directory.
7) re-activated the plugins.

Result: I can’t access my dashboard or my website. I get this message:

Warning: require(/home/content/s/c/r/scribblerlinux/html/wp-includes/load.php) [function.require]: failed to open stream: No such file or directory in /home/content/s/c/r/scribblerlinux/html/wp-settings.php on line 19

Fatal error: require() [function.require]: Failed opening required ‘/home/content/s/c/r/scribblerlinux/html/wp-includes/load.php’ (include_path=’.:/usr/local/php5/lib/php’) in /home/content/s/c/r/scribblerlinux/html/wp-settings.php on line 19

Since then, I have reversed the process,
– disabling plugins (that was while I could still access the dashboard),
– re-uploading the backup wp-admin and wp-includes,
– uploading individual files of wp-content.

Same results

How do I get back to my dashboard?
Thanks in advance for your help