I had to special order a 2x6" jamb exterior door from lowes, so while I wait, I had a couple questions. Do I have to remove the interior trim boards to take the old door out? I was figuring once I cut the nails holding the old door in, the door will fall to the outside, right? So I was thinking that when I go and put the new door in, I'll just position the door so that it pushes up and against the trim boards on the inside. Would this work, so that I didn't have to remove the interior trim boards?
Also, what kind of flashing do I use on the new sill plate area? Lowes didn't seem to have the stick on stuff I've seen online. thanks.

 

If your existing opening is somewhere near 32" wide, then cutting the nails in the jamb would work fine. There are probably nails in the trim as well, so it will have to be pulled. Make sure the hinge side framing boards are plumb. Then install the unit flush on the hinge side against the framing, squaring the head along the top. The latch side will square up as well. Then you can trim it out.

 

Sorry, gotta ask again, but where can I get the peel and stick flashing?

 

Lowes and Home Depot will have small rolls of it nearby their roof flashings and such... close to the housewrap and housewrap tape.

 

Also the wrap might be in the millworks area, depends on how it's merchandised.
For whatever reason, when we started carrying it back it the day, it was in the plumbing section near the duct tape. I guess cause it was from the same manufacturer. Soon as I found it, moved it over near the new construction windows.