Orphand Users And Schema Problem

I have transfered few databases in sql server 2000 to sql server 2005.I was checking after recovering the database

exec sp_change_users_login 'report'

for each database..

Then i found so many orphand users.

From Microsoft web site
I Executed stored procedure sp_help_revlogin in 2000 and the result i copied to 2005 and when i executed the orphand users which i wanted for users that didn't help fixing the problem

i used this link to fix orphand users but that didn't help me
http://support.microsoft.com/kb/246133
So under users for each database i started deleting orphand users and adding them again..that was helping me...But
to delete the users i had to delete the schema and then delete user which was hard as i have so many databases...
which worked out fine.
But then when i was trying to delete schema's for few they dont get deleted because there where tables with that schema..

And One orphand user was 'dbo' how do i solve this situation.

the databases i am moving is from sql server 2000 to 2005 but they are two different server not to instances

How is the best possible way to fix this...I dont know passwords for users so i want them as they where in 2000 database