Dust Speck Inside Canon Powershot G11 Lens

I have what appears to be a dust spec on the inside of my Canon Powershot G11 lens and I want to disassemble, clean and reassemble. I took it to a shop that looked at it and they are 99% sure that it is not dead pixels in the sensor. They advised buying a new camera because repair would be $100's or find a used G11 without the dust speck and did lament that the G11 is a great camera, had a cult following and it was almost impossible to clean the innards.

Anyway if it is trash I might as well take a stab at cleaning it. Is there a manual that will guide me though the inner world of this cube packed with technology with a hope of being able to reassemble it?

Ed