First off, total noob here when it comes to HDR, so bare with me. I guess I am not sure what the proper settings are to create HDR images with this Canon Rebel XSi. First question - what setting on the knob should I have it set to when shooting the HDR images? Here is where the real noob comes out. Here are the settings on the knob: P, TV, AV, M, and A-DEP. Which do I choose??? Second question - I know where to set the AEB settings (-2, 0, +2) Is there other settings I need to be aware of? Once I get all the settings in place can I keep this setting? Or is this something I will need to set each time? Third - As far as software, I do have Photomatix Pro 3.2...is there other ones out there that I should get that work as well if not better? Another setting - AF mode, there are 3 options: One Shot, AI Focusm AI Servo...which setting do I need it on? I already have continual setting set. HELP! Any help will be greatly appreciated!