I’d be interested to see how well this works on Vista, XP, 7, …complaining about “libcurl-4.dll missing” (although it’s there at c:\CPU-miner\usr\i686-pc-mingw32\sys-root\mingw\bin) it won’t even start on 64bit XP&7, 32bit XP, am i missing something?
Try adding c:\CPU-miner\usr\i686-pc-mingw32\sys-root\mingw\bin\ to your PATH, then run minerd.exe?