I also sail with people who are not expereinced. I have a 150% genoa. Sine the main sail pretty much takes care of itself during tacks, that leaves you availabel to tack the head sail. You can easily talk a person through a tack, especially if thier only job is to release the now windward sheet. If you want to get together sometime and talk sailing PM me. I am docked at Watergate.
Nick - You apparently aren't setup in your profile to allow PMs. (The option doesn't come up when I click on your name).