It would be helpful if the Author added comments to the article and code, including what version he/she created this on and on what versions it is known to work. In this case its a pretty simple script, yet what [font="System"]sp_change_users_login [/font]does and how it works is still kind of vague. Of course I can google it, but it would be good if the Author addressed that, since its the backbone of the script.

BTW... msdn states that [font="System"]sp_change_users_login [/font]will not be used in future releases and advises not to include in new dev work