Oh ok....well I'll leave this here in case it helps anyone else.
Ok, here is a rundown of how I did it - not saying it's the best or only way, but here ya go:
1. Open all 5 images in photoshop.
2. Choose the image where you appear the furthest back in the scene to be the main or background image which you paste all of the other ones on to. For example in the living room scene I started with the shot where I was lighting the candle.
3. Now go to the next image that you want to include - I chose the one where I was sitting on the exercise ball.
4. Using the polygonal lasso tool make a loose selection of yourself in the second image. I like to leave a bit of the background detail around my body because it makes it easier for me to match it up to the background image.
4. Go to edit - copy and then click on your background image and go to edit - paste. Your cut out self from the second image should now appear on the background image in a new layer.
5. Go to your layers pallette and lower the opacity enough so that you can see the background through the cutout. This makes it a lot easier to match things up. After you get it matched up, as long as you didn't stand in front of yourself in any of the shots you can probably just raise your opacity and then move on to the next image that you want to cut and paste.
6. You might need to erase part of your cut and paste self to fit in better with the background image. I had to do this when I was working on the parts of the photo where I'm sitting on the couch looking at the laptop. I did this by making sure that I highlighted the layer that needed to be cleaned up and using the eraser tool to get rid of whatever I needed to. You will probably have to adjust your brush size and intensity to get it all done decently.
That's it really for my method. Just repeat the steps for however many images you need to layer. I hope that made sense - if not, let me know.