I think that maybe a trusted advisor that you both know might help. You don't want to tear down the company and neither does Jim. How can you both get what you want?
What do you want? I thought it was equity when I first read this, but some of your comments read like you'd be ok with some money. I would think carefully about this before moving any further.
Someone made the point that the equity isn't likely to be worth much. I agree, but for me I'd be digging my heels in because of fairness. At the same time, maybe that doesn't matter as much to you right now.