How to define a table so it shows on every page, but doesn't interfere with editing?

How to define a table so it shows on every page, but doesn't interfere with editing?

I need a table in Word 2007, which needs to be on every page of the document. It is actually not a table per se, but a frame with three columns. The problem is it cannot interfere with editing, so I'm trying to avoid just inserting a lot of tables, and for now am using a made up table, made of lines, which I've putted in header field over the entire page.