What color is the fluid that is leaking out of the rubber boot?? Mine was leaking there but it was because of the slave cylinder leaking. If it is dark red it is more than likely the front seal. If it is clear or a grey color it is the slave.

I will look at mine to see about the oil pan. If I am not mistaken I think you can remove it with the engine in. I will verify that for you in the morning.