Assuming you've ruled out the obvious like putting a bookcase in front of the wires, I've seen some people use moulding or MDF wainscoting (with flat speaker wire). There are all kinds of pre-primed, hollowed-out MDF wall treatments (columns, etc.) that can be used to hide wire.

That being said, working with drywall isn't nearly as intimidating as it seems. Patching and sanding a hole is a pain, but even if you do a lousy job you'll be the only one who notices.