When I want to modify a table’s structure in SQL2005 Mgmt Studio, it always displays an alert box, saying “You are not logged on as the database owner.. blah blah”
It’s such a pain.. Is there any way of stopping that from popping up all the time?
not that I know of.
Now Stephen, you’ve set a precedent before, so I expect a groundbreaking hack to accomplish this! Don’t start getting lazy on us! 
why don’t you just add the role dbo to your user?