There is an update on Avsim for the FS9 Configurator 1.5 to 1.6 (the utility, which among other things, allows you to change the speed of AI a/c taxi-ing). Also very handy for spotting errors in config files.
Very small 203 Kb file at -
If you have v1.5 then uninstall, before installing v1.6
Must have missed this on my daily visits to "whats new" at Avsim. Thanks for the heads up Davec.