LLC details are different in every state, and in most states they are somewhat different for each LLC. Which forms you need depend on your specific situation, your location, and the specifics of the investor. Don't do this yourself. Work with an attorney.
Tim Berry is the chairman of Eugene, Ore.-Palo Alto Software, which produces business-planning software. He founded Bplans.com and wrote The Plan-As-You-Go Business Plan, published by Entrepreneur Press. Berry is also a co-founder of HavePresence.com, a leader in a local angel-investment group and a judge of international business-plan competitions.