[Fireball]

Yes, after you've installed the HUDConfig mod you can set the parameter 'SpeedbarUnits=0' in the [Mods] section of your conf.ini file. If you don't already have a [Mods] section you can add it at the end of the conf.ini. It would look like this:

[Mods]
SpeedbarUnits=0

There's a link in the original post to the README file which has all the details of the various options you can set with the mod.