Hi Perdrosva, I am afraid my plugin can not help you with your question. This is not something my plugin supports.
What I understand is that you would like to add an extra field ‘School’ to the user profile information. This can be achieved by adding custom fields. I would not change the tables that come with the WordPress installation. The following plugin will let you add custom user fields to the user profile.
http://wordpress.org/extend/plugins/developers-custom-fields/
When you have properly added a custom user fields, you could then use my plugin to display this data in the manage screen of users.
http://wordpress.org/extend/plugins/codepress-admin-columns/
Best,
Tobias Schutter
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Tanks for the answer.
I don´t understand very well the first plugin, i´m new in plugin development, and i don´t know how it works.
The easy away is cheat the system and use de description column for School info, and change the name in your plugin.