Ok, there is a version of the Res fix in the Subsim downloads that already contains the *.sdb file from the Compatibility Toolkit. So you don't need to mess around with that pos.
That version of the res fix works with SP2, SP3 and Vista (tested).
Desktop resolution has nothing to do with the res fix. I have already demonstrated SH3 running at multiple full screen ratios using the same PC. These were 1920 x 1080, 1440 x 900 and 1280 x 1024.
If the fix is not working for you then something else, probably your graphics card control panel, is interfering or overriding the mod.
Play around with some settings but assume the mod is good and look elsewhere.
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