I've been working on this post FOR DAYS and it seems blogger would really like me to fail at succeeding in finishing it! Seriously, I have spent hours trying to get my pictures on here and finally gave up and went with an entirely new system of posting pictures...photobucket!
So, anyway, I wanted to share the window seat project I did for the girls room with you. We used a stock cabinet as the base of the seat. I'm calling this a "sort of" tutorial, because I'm not going too far into details, but sharing the general steps we took to make this happen.
Here is the before shot of the dormer:

I started by removing the trim. Do you know how hard that was? I bought a new house -- a BRAND new house with BRAND new trim and promptly tore it apart. I literally had an upset stomach while I was doing this.
Anyway, to protect the walls, I put a paint stick between the little prybar I was using and the wall.

I realized very quickly that the little prybar wasn't going to work. There was just no way that the little toy I bought was going to get the trim off (I suppose it may have worked with smaller trim, but we have hefty deep moldings in this house). Luckily, the builder was in that day doing some repairs to the trim in the bathroom and left his nice big pry bar sitting on the counter while he was outside cutting pieces. See the difference? Once I "borrowed" his prybar, the process went quite quickly. I don't feel bad about borrowing it -- he dug around in our garage and used our saw horses without asking (and, incidentally, sat them over the spare car seat, which meant the car seat was covered in sawdust and had to be torn apart for a thorough cleaning). Note to self: don't be cheap with your tool purchases.

A side note on protecting the wall with a paint stick: it works, but not well. I kept dropping the sticks between the wall and the trim. See that little guy down there? Yeah...you can't get them out without removing the trim. I ended up with about 7 of them behind the trim before I got the first piece off, so if you are trying this, have a couple spares around.

But once I got all these little hiccups resolved, we ended up with this:

We had a major discussion regarding the carpet...do we remove it or install the seat over it? I feel strongly that the correct thing to do is to remove it. However, I was 95% sure that we would mess up the visible carpet in the process, so we decided to leave it. I figured the carpet could be cut later, when it was old and ugly and being sent to the dump anyway.
So, Jeremy built me a simple base out of 2 x 4's and screwed them into the wall.

Then we added some vertical boards. These served two purposes. One purpose is to provide support for the seat top along the wall. The other was to provide spacers to screw the ready made cabinet into, as the cabinet was smaller than the dormer space and we wanted the seat to be slightly deeper than the cabinet.

Then we added the stock cabinet that we purchased at Home Depot and fill pieces to the front. We had a heck of a time with the fill pieces...there were no precut pieces that fit the space and the store wouldn't cut them for us. They told us to get a table saw (hah, not likely). We ended up screwing two smaller pieces together instead and it worked out very nicely for us. We caulked and filled the gap and you can't tell from the finished product.

Then we attached the top. We chose the depth of the seat based upon the ready made boards in stock, so we didn't have the whole "don't have a table saw, what are we gonna do" dilemma this time. Jeremy also added a piece of trim to the bottom, too, to tie in with the rest of the base boards.

The top didn't fit perfectly, due to the fact that the walls weren't 100% square (are they ever?). So, we added some additional trim to tie into the board and batten. It worked out very nicely and the board and batten accents ended up hiding a lot of our carpentry sloppiness. Here you can see it after the trim and a coat of primer:

And, finally, after two painstaking coats of paint (which never would have gotten done if my in-laws hadn't swooped in and spent an entire weekend painting):

Another shot, showing the pink ceiling:

I must say that I AM IN LOVE with the way this turned out!!!! I can't wait to get a cushion on this thing. Pictures of the rest of the room to come soon!