I am not sure about the hack and I am afraid that it’s been a while since I used a 300D so my memory of the metering modes that are selected by the camera is rather sketchy. Have a play around and see in what modes the camera selects the different metering modes; this will give you an idea of what the camera has been told to use and a starting point. I am guessing that in landscape mode it will use evaluative for example. The next stage will be to test the camera to see what modes you can force using the hack (if installed) or by selecting AV or Tv priority.
After that bracketing shots is a way forward or better still would be to shoot in RAW. Canon RAW when processed in Photoshop CS will give you a working range of +/- 2 full stops so even if you meter incorrectly you have a nice area or scope from which you can recover. By processing the raw file twice, one converted for the highlights/bright areas and the other for the dark/shadows then combining them in Photoshop you should be able to cover all exposure issues, even the most complex.
Matt has kindly written a simple tutorial to demonstrate the process of blending the two different exposure together in Photoshop (Got Digital? Don't need filters. ) and Silkstone has followed suit and offered the same thing but utilising PSP.
Both of the tutorials can be found in our
Tutorials, links and reviews section.