Unfortunately nobody's business is standard, so that gets hard. If you have a lawyer you both trust, he or she might be able to help. Mediation isn't uncommon.
Good luck with this,
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.