I had an interesting issue today. I was working with a product that needed select privileges to the sys tables and have ownership of the table it was going to use on a SQL 2005 Server. After trying various combination of permission settings. I came across the following two commands that did the trick for me.

Grant SELECT privileges to tables:

SELECT 'GRANT SELECT ON ' + TABLE_NAME + ' TO [user]' FROM INFORMATION_SCHEMA.Tables;

Change table ownership:

ALTER AUTHORIZATION ON [database].[table] TO [user];

Everything inside the [ ] are the portions that I had to change for my specific set up.

So if you ever need to grant select privileges tables or grant ownership to a table in SQL 2005, I hope this helps out.
Dave