We've made it to green. So now what?

[crossedfingers]

Hi,
I'm so glad my cat has made it to the green stage. In spite of one pee accident which might have been able to have been avoided I've got a couple of questions. First a little background on my cat. He's moved along fairly quickly. It's taken him 4 going on 5 weeks to get to green but, he was pretty leary of this stage. Lastly, everytime he uses the potty he scratchs all of the litter into the toilet. How do you suggest I transition to the next stage? What do you think of taking of the lid of the toilet and just having the seat I'm kind of worried my 3 yr old might shut the lid. Your advice is appreciated.[/b]