Columns in edit page

I might not understand the reason for this plugin, but I thought it added the possibility to have more columns in my admin… I was under the impression that I could have more than 2 columns in the “Edit Page” and “Edit Post” of the admin… if it’s not the case, you might consider adding this in a future update, even though I need it now, and so I’ll look elsewhere, sadly. However, if it’s possible and I just didn’t find out how, can you please help me with that? Thanks!

http://wordpress.org/extend/plugins/custom-admin-column/