This plugin help you to customize order of meta boxes on posts screen. It perfectly works with custom meta boxes.

Usage

1. Install and activate plugin
2. Order widgets via filters. This plugin hasn't interface for this.
3. Update hash.

If you want to force users , add_filter( 'post_meta_box_order_force_override', '__return_true' );

• I changed meta boxes order but no effected users blog?
  • Don't forget to change hash. You can use post_meta_box_order_hash filter for that.
• Is it compatible with multisite?
  • Definitely!
• How can prevent to users change order?
  • Use filter: add_filter( 'post_meta_box_order_force_override', '__return_true' );

2.0

Filters added

1.0

Initial release

Extract the zip file and just drop the contents in the wp-content/plugins/ directory of your WordPress installation and then activate the Plugin from admin's Plugins page.