Private limited company - Help please!!!?

Who on earth told you this? The point of being a limited company is that your assets and those of the business are separated and your assets can't be used to pay a business debt. Make sure you have the right sort of liability cover and that it covers everything that you need it to cover. If anyone sued you then they would have to sue the company not you as an individual. To reduce the risk make sure you operate on a belt and braces system eg use two cameras at least on a shoot and these days with digital you can take as many pictures as you like at no cost.