to take the dash off, it is simple, but tricky!!! there arent as many screws that need to come off as the manual says, the 2 under the steering coloum dont need to come off, the top clips off, so skip those.
But u may find tha you will need to weight downwards on the passenger air bag part of the dash while you pull the dash toward the back of the car, as there is a huge clip thats really hard to get past with only one person,
you should be able to figure it out, if you have problems you can PM me.
Where did you get the stalk adaptor from? how much?
the remote turn on, should be linked to the remote turn on of the HU, or any other power out from the HU eg a power antena power out, just so the adaptor gets power, but only when the hu is on, yes this has to be connected, and if you have an amp as well, you will have to plug the remote on into the stalk adaptor, then the lead from the amp into the remote on out from the stalk adaport again - if that makes sence!!
HTH
Rorrie