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How to make HDR Photos with non-SLR Canon Cameras
High Dynamic Range (HDR) photography takes multiple shots at different Exposure Values (Heretofore EV OR EXP), and then through software on a PC puts them together into stunning pictures.
Here is a page I made with a few examples. They are Rollover JPGs so wait for the page to load, then roll over the image to see the HDR version.
Due to the popularity, most cameras, especially at the prosumer level are starting to build this function into the camera. But there is some nifty non-destructive firmware that one can turn just about any Canon camera into a HDR phototaking machine. It’s called “CHDK”
It’s basically just a temporary firmware you can load onto your camera to give you more control over every single aspect, including taking photos for HDR. Here is a step by step on exactly how to do HDR only. You will need a steady hand or tripod, and a Canon camera that supports this software. And you will not be using your flash.
SETUP:
1. Download the FULL firmware for your camera. Unzip it. You will see something like this:
2. Copy over everything except for the 2 text files and the CHDK folder to the root folder of your Memory card. That part is done forever.
Camera Setup
1. Turn on your camera into normal picture taking mode.
2. Press Timer (Down?) and keep going down to
“Custom Taking Picture Mode” 
“Custom Taking Picture Mode” 3. Hit MENU and go to “Self-Timer” > (SET) then change the delay to “0″ zero, and 3 or 5 shots. I suggest 3.
Now, that’s all set up. These steps were one time only as well.
PRE- USEAGE (CHDK Basic Useage)
1. Turn on camera via “Display” mode or press Display (Play), go to Menu, all the way at the bottom is “Update Firmware”. It will ask if you want to upgrade firmware. Do it. In a few seconds it will reboot with a little weird logo CHDK, like this:
Now the firmware is all loaded up and ready to go. Your camera is running a modified Operating system now. When you turn your camera off, it’s gone and your camera is back to normal. Some people boot up with this mode on all the time because of it’s increased functionality, you can find out how on their website.
USEAGE (Every time you want to take an HDR photo set):
1. Press the Direct Print Button 
2. Press Menu - You should see a modified Menu that you haven’t seen before.
3. Go down to “Extra Photo Operations” menu and select “Bracketing in Continuous Mode”.
Set the 1 EV for “TV Bracketing Value” and change “Bracketing type” to “+/-”. (or 2 with 3 pictures, play with it)
4. Now press the camera’s release button and it should look like it’s in normal operating mode. Frame up your shot. Make sure it’s stable or via tripod and flash is off.
5. Press down (Self Timer) 
and select Custom (SET). (Remember we already set this up.)
6. Press release and it will shoot a series of 3-5 shots, whatever you set it up as, with EV bracketing of 1 or 2 or whatever you set it up as. (is Exposure Value)
You can see one shot will be normal, one shot very light, one shot very dark. Now you have your 3 pictures. You are done.
POST PRODUCTION
Now you have the three to five pictures.
1. The easiest way is to just use Photomatix Pro version 4 and drag and drop them in. Jared said that’s what everyone uses. So be it. It may ask you what you used as EV (Exposure Value) and it will line them all up and make a pretty High Dynamic Range (HDR) Picture for you.
2. You can use Photoshop. Here is a guide, I tried it and it worked, but not as well as Photomatrix.
OR just google for alternative solutions. I’m sure there is tons of stuff that can help you along the process. I’ve tried the Photoshop method, and was not impressed. It was okay, but it was complicated and didn’t do as good of job as Photomatrix did. I’m sure there is some good free software out there. Let me know.