I have to apologize because I'm not realizing that you probably have a riser-tread system; not a rail system. What I was referring to was the rail system. So, in other words, if you have a traditional stairway, where the tread is supporting the baluster and handrail, then I can't make a recommendation w/o breaking BOCA code. You might want to talk to a pro at a job site or something to see if they know of a way to do it w/o breaking code.
So I'll spare you the explanation unless you DON'T have a traditional stairway. If you need more, e-mail me directly. (This 'thread' is getting burried real fast!)