150bhp???

Hi,
I have an a4 1.8t 2000 tiptronic.
like to mod it.
I have access to abt chips or superchips.
I'm going for the abt chip.

1. are there any other changes essential in the car for the abt chip?
2. i can't find info as to what elements are being reprogrammed ( except for the turbo ).
does anyone know something about it?
3. is the tiptronic transmission affected?
4. is it possible that the abt chip doesn't work with tiptronic transmission?
5. i know there are specially designed chips for improving tiptronic transmission. is it essential when rechipping for power?

Thanks.