Typar tape will not stick well to wood. A good flexible self sealing membrane tape will stick to wood.

Pre-made sill pans are nice but are typically used in new construction applications. How much of the siding will you be removing?

Thanks, I think that is what I am looking for.

I would like to remove as little siding as possible. Obviously I will remove the outside trim, which should give me most of the room I need for the flashing. Worst, case I may have to sawzall a few nails to get the flashing to be wide enough.

So something like this:
http://www.tarcoroofing.com/pdf/LB_Door_&_Window.pdf
should work well over wood.

I can use a beveled piece of siding instead and not caulk the bottom of the window.

Thanks again!