WordPress.org

The Dashboard Tweaks plugin requires WordPress 3.3-beta4 or higher.

1. Upload dashboard-tweaks.zip to the /wp-content/plugins/ directory
2. Edit the files dashboard-tweaks.php and /css/wp-admin.css to your liking (link: /wp-admin/plugin-editor.php?file=dashboard-tweaks/dashboard-tweaks.php). See below what can be changed on which lines.
3. Alternatively you can unzip the file on your computer, do your edits and then upload the entire directory dashboard-tweaks to the wp-content/plugins/ folder.
4. Activate the plugin through the 'Plugins' menu in WordPress and enjoy your customized WordPress Dashboard!

Change images for admin favicon and toolbar logo:
Use FTP to upload your own images, the admin favicon is called dashboard.png and the toolbar logo is called adminbar-logo.png; both files are located in the images folder of the dashboard-tweaks folder.

Which lines of dashboard-tweaks.php can be edited?
lines 63-81: change menus that are hidden and/or the text that shows when hovering over the new toolbar logo line 89: If you want to change "Welcome Back" to something else
line 96: change tab title text<br/> line 103: change custom footer text

Which lines of /css/wp-admin.css can be edited?
lines 6, 10-11: (hover) background color for toolbar logo
line 18: change page heading size
line 25: change colored background to activated plugins to add contrast
lines 28-29: change colored background to sidebar active sub-menu to add contrast