I just linked the tool with libmoto, the new ppc math library available at www.mot.com. I ran this simple-minded script: $time1 = time; $i = 1.0; while ($i < 1000000.0){ $cos = cos($i); $log = log($i); $sqrt = sqrt($i); $sin = sin($i); $i = $i + 1.0; } $time2 = time; print "Total time: ", $time2 - $time1,"\n"; Running on an 8500/120, and using the default tool linked with MPW/CW10, I get: Total time: 36 Using the tool linked against libmoto, I get: Total time: 30 Their license is kinda wordy, but seems to indicate that distributing the ppc tool and app should be ok. Your interpretation may vary. Bill